Decentralized Real-Time Collaborative Documents
With the introduction of IPFS PubSub, it became possible for IPFS nodes to declare shared pubsub topics, broadcasting updates in real-time to other nodes in the network that have subscribed to the topic. The pubsub pattern is a powerful construct but it does not guarantee delivery of messages and does not guarantee message order. Enter CRDTs, Conflict-Free Replicated Data Types, a higher level data structure that allows us to overcome these shortcomings.

Enter CRDTs, Conflict-Free Replicated Data Types

CRDTs are one of the hot interesting topics in distributed systems. They provide a conflict-free manner of replicating data across multiple nodes without ever having to elect a leader or use another type of centralized authority to reach consensus. They even allow nodes to reach the same state without being connected to the network at the same time.

CRDTs were first introduced in 2011 by Carlos Baquero, Nuno Preguiça, Marek Zawirski and Marc Shapiro. You can learn more about CRDTs in the IPFS research collaborative notebook on CRDTs.

By forming ad-hoc sets of nodes (ie. using pubsub) and using CRDTs, nodes can come in and out of a cluster and participate in a higher level protocol.

Use case: Collaborative Text Editor

One set of use cases for CRDTs is when nodes need to collaboratively write to a shared data structure. In the past, this has been achieved by relying on a centralized service to coordinate updates. This centralized approach encourages the wordlwide web to grow in a way that relies on a few private entities to control the the content and delivery of the web. This is neither safe nor scalable. We must move away from centralized services, instead relying on truly distributed peer-to-peer systems that are not controlled by a single entity.

In this 10-minute video I show you how we can use the js-ipfs library and conflict-free replicated data types (CRDTs) to build a simple text editor that allows several peers to collaborate in real-time. The resulting interactions between the nodes are conflict-free, support offline use, and allow nodes to come in and out of the network while continuously converging data to a single state in all the nodes.
collaboration  tool  technology 
4 days ago
A clean-tech revolution. Interoperable flooring system generating renewable power & data from your footsteps.
9 days ago
Are you still playing tier 1 tier 2 like kids ? Read this
Recent case study about "weight loss" website

1) I bought 20 guest posts from someone (not here on bhw)

2) All guest posts had the main keyword in title

3) I loaded up magic submitter and build few campaigns to these posts (please confirm with your providers if backlinking is allowed or not). Then the usual GSA campaign to these MS links indexing etc. etc.

In 2 weeks my website was in top 80 and 5-6 posts were in top 100. After 4 weeks all posts were in top 80 and my website was in top 30. 7 weeks of constant MS + GSA my guest posts were in top 50 and my site was 5th rank on page one.

Now i am enjoying rank 1 (beating medicine, web md, wikihow etc. for that keyword). I have 65 guest posts from different providers and 53 are in top 100.
11 days ago
Why Activation is the Most Important Pirate Metric
Activation takes place when users first achieve the value you promised. It’s calculated as a percent of activated users out of total acquired users.
activation  customer_service  CRO 
12 days ago
Customer Feedback Strategy: The Only Guide You'll Ever Need
How to gather, share, and implement customer feedback that will skyrocket your business growth by helping your customers succeed.
CRO  customer_service 
12 days ago
Cement tiles Factory
The Mosaic del Sur® factory in Tangier and the showrooms throughout Europe manufacture and sell encaustic cement tiles, granito tiles and zellige tiles.
13 days ago
Index Ventures
Entrepreneurs know how important stock options are for hiring and retaining the best talent. But to create an effective option plan you need to know how much to award to each team member. We compiled the largest ever set of benchmark data, comprising over 4,000 option grants from more than 200 startups across the US and Europe. We want to help you get this right.
startup  esop  options  employees 
17 days ago
So, You Need a Statistically Significant Sample?
- Overview of hypothesis testing and power analysis for basic A/B testing. If you are an experienced data scientist, you will find this information familiar. If not, this may serve as a useful intro or refresher.
- How to deal with the detectable difference. This is the most important and challenging parameter in power analysis. Specifically, we will discuss how to tie the detectable difference to the business/research context of the study.
- Examples of how to generate power analyses in R using the stats package. We will also demonstrate how to visualize the results with ggplot.
19 days ago
Miller’s Law · The Magic Number
Always organize elements of information in categories no larger than 9, but preferably ~5 chunks.
design  ui  ux 
21 days ago
Persona is a compact, powerful and economic site builder; it is part of the Cargo set of web tools.
design  webapp 
23 days ago
Thrive’s a great assistant and an elegant way to ensure your creative projects run smoothly.
freelance  tool 
23 days ago
You run your business. We do your bookkeeping.
bookkeeping  accounting 
23 days ago
Buying art shouldn’t feel intimidating.

You don’t need to know anything about art to love art - even though some places make you feel that way. At Twyla, we make it possible for everyone to directly access exclusive artwork from the most talked about artists in the game.
art  marketplace 
23 days ago
Indie magazine publishing made easy.
Heftwerk is a Berlin-based network of services helping you plan, produce, ship, and distribute your own print publication.
publishing  indie 
23 days ago
Settle design debates with data
Remote user testing to help you
make confident design decisions.
24 days ago
Évolution de la population mondiale dans l’histoire
Il nous a fallu 200 000 ans pour atteindre 1 milliard d’humains. Puis 200 ans seulement pour arriver à 7 milliards. À la fin du 21e siècle, nous pourrions être 11 milliards d’humains sur Terre.
26 days ago
Markdown here
With no extra effort on your part, Markdown Here eliminates all the hassle of formatting email. Empowerment through simplicity.
4 weeks ago
Mattereum is the first Internet of Agreements infrastructure project for legally-enforceable smart contracts, enabling the sale and lease of physical property and other transfers of rights in assets.
Mattereum comprises expert lawyers and programmers and a leadership team experienced in designing and launching nation-scale infrastructure.
The Internet of Agreements [“IoA”] is the next wave of digital commerce, built on legally encorceable smart contracts. Beginning in the 1970s, the internet has enabled us to share ideas and information.
crypto  blockchain 
5 weeks ago
The Definitive Guide To SEO In 2018
This is the ultimate guide to dominating Google’s search results in 2018.

And let me be clear about something:

This is NOT a lame “SEO in 2018” predictions post.

Instead, you’re going see tested strategies that are working right now…and will work even better in 2018.

So if you’re looking to up your SEO game this year, you’ll love this guide.

Let’s dive right in.
5 weeks ago
Coinlancer is a decentralized job market built on Ethereum platform, which empowers burgeoning freelancers and clients from across the globe. The traditional ways of freelancing don’t seem to work anymore. Same principles, unexplained account suspensions, unaddressed or prolonged disputes often leave you exhausted.

So we introduced Coinlancer. We embrace blockchain technology to help you keep up with the trend of freelancing. Safe, Secure and transparent! Say goodbye to outdated job markets, and take your plunge into freelancing on Coinlancer for better performance and engagement. We made freelancing secure. Discover more than what traditional freelancing platforms offer, join us in pitching successful blocks of freelancing.
freelance  marketing  blockchain 
6 weeks ago
Winding Tree
Switzerland-based non-profit, is the blockchain equivalent of Airbnb
blockchain  travel  marketplace 
6 weeks ago
Build landing pages fast, get more conversions.
Whether you’re a newbie landing page creator or a pro, Unbounce gives you the tools to not only build custom landing pages, but also get more conversions on your website.
landing  page 
6 weeks ago
No one knows everything, but everyone knows something. With Brainly, students combine their strengths and talents to tackle problems together.
students  learning 
6 weeks ago
Freelance day rates London
The average day rate across all contracts in 2017 is £308. Keep in mind that this looks at all disciplines, all sub-disciplines, all levels of seniority and all contract lengths and all types of clients.
7 weeks ago
Téléchargez les modèles d'autorisation d'utilisation d'image du livre Droit à l'image
Édité dans la collection Les Guides Compétence Photo, l'édition 2018 du livre de Joëlle Verbrugge intitulé "Droit à l'image et droit de faire des images • 2e édition" se veut un ouvrage complet et pratique destiné à l'ensemble des créateurs ou utilisateurs d'images, les règles juridiques étant identiques quels que soient le contexte de la diffusion des images et la technique artistique utilisée. Voici quelques modèles d'autorisation d'utilisation d'image, présentés et commentés dans l'ouvrage et disponibles gratuitement au téléchargement. MISE A JOUR : octobre 2017.
photography  photos 
7 weeks ago
Connu pour ses sculptures de fruits, Cédric Grolet a été élu meilleur pâtissier de restaurant du monde
Meilleur chef pâtissier de France depuis 2015, Cédric Grolet a été élu meilleur chef pâtissier de restaurant du monde le 17 octobre, lors du gala Les Grandes Tables du monde, à New York. Le prestigieux jury, composé de grands noms de la gastronomie comme Pierre Hermé ou Jean-François Piège, a salué « l’audace stylistique et technique » de ce chef qui officie au Meurice, restaurant doublement étoilé, à Paris.
Et l’audace de ce jeune virtuose est particulièrement appréciée sur les réseaux sociaux depuis quelques années. Aujourd’hui, plus de 560 000 personnes le suivent sur Instagram, plus de 130 000 sur Facebook et on l’a vu à plusieurs reprises à la télévision, dans des émissions culinaires.
7 weeks ago
Thoughts on Tokens
- Tokens are analogous to paid API keys: The best existing analogy for tokens may be the concept of a paid API key. For example, when you buy an API key from Amazon Web Services for dollars, you can redeem that API key for time on Amazon’s cloud. The purchase of a token like ether is similar, in that you can redeem ETH for compute time on the decentralized Ethereum compute network.

- Tokens enable a new business model: better-than-free: After the early kinks are worked out, the token launch model will provide a technically feasible way for tech companies (and open source projects in general) to spread the wealth and align their userbase behind their success. This is a better-than-free business model, where users make money for being early adopters. Kik is the first example of this, but expect to see more.

- Tokens may be generalizable to every tech company through paid logins: It’s not hard to imagine selling tokens as tickets — for access to logins, to car-rides, to future products. Or distributing them as rewards to the authors who power social networks and the drivers who power ride-sharing networks. Eventually, tokens can be extended to hardware as well: every time someone buys a slot in line for a Tesla Model 3 or re-sells a ticket, they’re exchanging a primitive token. But the model will need to work for protocols first before being generalized.
crypto  blockchain 
9 weeks ago
Five Books
Five Books is building a comprehensive library of knowledge, curating recommendations on any topic you might want to read books about. We have covered 1,055 topics so far and aim to add at least two new ones every week.

We ask leaders in a field to make book recommendations in their area of work and explain their choices in an interview. Our interviews range from engaging introductions to specialist subjects—such as the Dutch Masters, Globalization, “Anti-memoirs”, Existentialism, Violence (or its decline)—to in-depth explorations of more personal themes and inspirations, from the likes of Woody Allen, Ian McEwan, Margaret Drabble and Elif Shafak.
9 weeks ago
Defining aggregators
Aggregation Theory describes how platforms (i.e. aggregators) come to dominate the industries in which they compete in a systematic and predictable way.
- Direct Relationship with Users
- Zero Marginal Costs For Serving Users
- Demand-driven Multi-sided Networks with Decreasing Acquisition Costs
marketplace  aggregation 
10 weeks ago
Get online retail insights for any book

OptiQly helps marketers interpret dozens of signals and ranking factors that impact sales performance at online retailers such as Amazon
amazon  kindle  books 
10 weeks ago
The world’s first cryptocurrency index fund.
The Bitwise HOLD 10 Private Index Fund holds the top 10 cryptocurrencies weighted by market cap and rebalanced regularly, much like the S&P 500. It’s a traditional investment vehicle. You buy shares, not coins.
10 weeks ago
Lock in attribution, securely share and trace where your digital work spreads.

Lock In Attribution
Create a permanent and unbreakable link between you and your creative work. That link – the record of ownership – can be forever verified and tracked.

Securely Share
Securely share your digital content with friends, family or fans. Transferring work is made as easy as sending an email. Literally.

Gain Visibility
Trace where and how your work spreads on the Internet. We show you all the sites your work has appeared on and its growth over time using WhereOnThe.Net.

Certificate Of Authenticity
Each registered piece comes with a COA, a built in unique cryptographic ID and the complete ownership history. The COA can be verified anytime and printed out, see an example here.

Limited Digital Editions
Create unique, limited editions, a first for digital content. Digital editions make it possible to own and transfer digital artwork just like you can with physical art.

License Your Work
Transfer, consign or loan your digital creations without losing attribution. Our easy-to-use platform comes equipped with clear legal framework and supports custom contracts.
12 weeks ago
Disrupting Venture Capital with the Blockchain
SPiCE is announcing an ICO for its Liquid VC.
This time, it’s the VCs who are being disrupted.
VC  blockchain 
september 2017


Put your unused storage to work by becoming a Filecoin miner. Use the Filecoin mining software to get paid for fulfilling storage requests on the Filecoin market.


The Filecoin currency will be traded on a number of exchanges and supported by multiple cryptocurrency wallets, allowing you to easily exchange Filecoin for other currencies like US Dollars, Bitcoin, and Ether.


Clients can tune their storage strategy to suit their needs, creating a custom balance between redundancy, speed of retrieval, and cost. The worldwide Filecoin storage and retrieval markets make vendors compete to give you flexible options at the best prices.
cloud  storage  crypto 
september 2017
Your decentralized private cloud
Welcome to a new era of cloud storage on the blockchain

Completely private

Sia splits apart, encrypts, and distributes your files across a decentralized network. Since you hold the keys, you own your data. No outside company can access or control your files, unlike traditional cloud storage providers.

Far more affordable

Sia's decentralized cloud is on average 10x less expensive than current cloud storage providers. Storing 1TB on Sia costs about $2 per month, compared with $23 on Amazon S3. Calculate your savings below!
storage  cloud  crypto 
september 2017
Storj (pronounced: storage) aims to become a cloud storage platform that can’t be censored or monitored, or have downtime. It is the first decentralized, end-to-end encrypted cloud storage that uses blockchain technology and cryptography to secure your files.

Storj is a platform, cryptocurrency, and suite of decentralized applications that allows you to store data in a secure and decentralized manner. Your files are encrypted, shredded into little pieces called 'shards', and stored in a decentralized network of computers around the globe. No one but you has a complete copy of your file, not even in an ecrypted form.

Because of this, Storj can be faster, cheaper, and more secure than traditional cloud storage platforms. Faster because multiple machines are serving you your file simultaneously, cheaper because you are renting people's spare hard-drive space instead of paying for a purpose-built data center, and more secure because your file is both encrypted and shredded. There is no need to trust a corporation, vulnerable servers, or employees with your files. Storj completely removes trust from the equation.

Storj uses blockchain features like a transaction ledger, public/private key encryption, and cryptographic hash functions for security.

Storj is working hard to solve data security issues with the help of its own web app, Storj, which lets you store your files, and client app, Storj Share, which lets you rent your hard-drive space for money.

To best protect your data, files are encrypted client-side on your computer before they are uploaded. Each file is split up into chunks which are first encrypted and then distributed for storage across the Storj network. The network is comprised of Storj Share nodes run by users around the world who rent out their unused hard drive space in return for Storj Token (STORJ).

The decentralized aspect of Storj means there are no central servers to be compromised, and with client-side encryption, your are in control of the keys to your files.
storage  cloud  crypto 
september 2017
I’ll Pay You to Read My Book
- Readers would purchase an e-book for a fixed amount, say $5. They would use an e-book reader to read the digital book. The e-book reader would contain software that would track their reading usage – how long it took on average to turn a page.
- If the behavior patterns exceeded the threshold level – say 95% of pages turned at the right speed — then the e-book device would initiate a predetermined payment to the purchaser.
- If a reader is given credit for reading the book, then he/she would earn more than they paid for the book. For example, if they paid $5 for the ebook, they would get back $6, thus earning $1 for reading the book. Not only did the book not cost them anything, but they made money reading the book. If they read it.
september 2017
The new super simple way for startups and investors to complete a UK funding round
funding  startup  legal 
september 2017
Ivy is a cloud-based business management tool built for interior designers.
design  interior 
august 2017
august 2017

(6) TABLE KNIFE | 22cm
(6) TABLE FORK | 21,5cm
(6) TABLE SPOON | 21cm
(6) TEA SPOON | 12cm
Cutlery  design 
august 2017
The ICONOMI Digital Assets Management Platform is a new and unique technical service that allows anyone from beginners to blockchain experts to invest in and manage digital assets.

ICONOMI is more than just a marketplace for digital assets. We provide the best experience and simplest method for entering the growing distributed economy.

With a broad set of unique and intuitive tools for people of any skill level, ICONOMI enables users to invest in and manage various digital assets and combinations of digital assets called Digital Asset Arrays™.
blockchain  investment 
august 2017
F Stop Gear
Thats why f-stop camera bags and transport systems are engineered to do more than just help you survive the journey. By collaborating with professional outdoor photographers, the designers at f-stop have rethought what it means to haul camera equipment. f-stop brings you hardworking packs, designed to protect your gear and keep you organized, even in the most hostile environments. Whether you’re shooting downtown or deep in the backcountry, we build each one to get you and your gear there safely and efficiently, ready to focus on the image.
mountain  backpack 
july 2017
Grid+ leverages the Ethereum blockchain to give consumers direct access to wholesale energy markets. This allows customers to respond intelligently, which increases efficiency, decreases cost, and helps move us all to a cleaner future.
energy  Etherum  ETH 
july 2017
We've pioneered a compact device with insightful functionality. Hear any text, appearing on any surface. Recognize the faces of people in your life. Identify supermarket products and money notes. For people who are blind, visually impaired, or have dyslexia, aphasia or other conditions. OrCam MyEye gives independence.
eyes  startup 
july 2017
Deep Optics is the inventor and pioneer of novel electronic lenses technology, with a mission to transform the world of vision correction and lead it to the era of dynamic optics. The company had developed a cutting-edge liquid-crystal (LC) based lenses technology, addressing the growing need for dynamic vision correction, primarily in the markets of progressive eye-glasses and Augmented Reality and Virtual Reality (AR/VR) headsets. Our fully-transparent, non-moving-parts, ultra-low-power LC lenses, allow fast and seamless change of optical prescriptions during use. The most crucial element for revolutionizing the progressive glasses market as well as many other human vision aid systems.
glasses  eyes  startup 
july 2017
We offer a diverse selection of courses from leading universities and cultural institutions from around the world. These are delivered one step at a time, and are accessible on mobile, tablet and desktop, so you can fit learning around your life.

We believe learning should be an enjoyable, social experience, so our courses offer the opportunity to discuss what you’re learning with others as you go, helping you make fresh discoveries and form new ideas.
mooc  learning 
june 2017
Create virtual cards with the Privacy
browser extension and protect yourself
from fraud and hidden charges.
june 2017
Add holograms into your real-world.
Take videos and photos to share with friends. Have fun Holo-mixing!
june 2017
Has built a kind of app store for algorithms. The service aims to make it easier for any company to use machine learning.
machine-learning  AI 
june 2017
Manage your metadata

Supadu loves and understands metadata whether it is delivered through ONIX. Control your metadata in real time directly to your websites. Add additional assets, change marketing information, boost your “search” and create catalogues.

Build your website

Display metadata in multiple ways, including a fully featured site search and recommendation engine to create your publishing website through the Supafolio API.

Website Built

View the websites built using the Supafolio Platform on our client page

View our platform
websites  publishing 
june 2017
Proton VPN

Regular VPN services can be compromised if their servers are under surveillance. ProtonVPN prevents this by first passing user traffic through our Secure Core network in privacy friendly countries like Switzerland and Iceland. Thus, even a compromised VPN endpoint server will not reveal your true IP address. Learn more


ProtonVPN exclusively uses ciphers with Perfect Forward Secrecy, meaning that your encrypted traffic cannot be captured and decrypted later, even if an encryption key gets compromised in the future.


We are headquartered in Switzerland which has some of the world's strongest privacy laws. Switzerland is also outside of EU and US jurisdiction and is not a member of the fourteen eyes surveillance network.


ProtonVPN is a no logs VPN service. We do not track or record your internet activity, and therefore, we are unable to disclose this information to third parties.


ProtonVPN also integrates with the Tor anonymity network. With a single click, you can route all your traffic through the Tor network and access Onion sites.
june 2017
Standard Ebooks
Standard Ebooks is a volunteer driven, not-for-profit project that produces lovingly formatted, open source, and free public domain ebooks.
Ebook projects like Project Gutenberg transcribe ebooks and make them available for the widest number of reading devices. Standard Ebooks takes ebooks from sources like Project Gutenberg, formats and typesets them using a carefully designed and professional-grade style guide, lightly modernizes them, fully proofreads and corrects them, and then builds them to take advantage of state-of-the-art ereader and browser technology.
Standard Ebooks aren’t just a beautiful addition to your digital library—they’re a high quality standard to build your own ebooks on.
ebook  design 
june 2017
Shadow Tech
Vivez pleinement votre expérience de jeu
La puissance est désormais à portée de main. Grâce à une amélioration drastique des technologies associées au cloud computing et aux protocoles de transfert, nous avons développé Shadow, un ordinateur complet surpuissant à un prix imbattable. Des centaines de serveurs équipés de GPU de dernière génération, la garantie d'avoir une image HD parfaite à plus de 100 fps et un lag inférieur à 16ms.
june 2017

TenX connect your blockchain assets to everyday use. TenX card issuing & banking licence will make TenX a hub for blockchain ecosystem to connecct to real-world.
blockchain  Etherum  ETH 
june 2017
Corilla - Collaboration & publishing for technical writers
Corilla is built for intuitive content workflows
A markdown editor with version control and hosting all in one.
Markdown Editor
A blazing fast markdown editor in the cloud. Built by technical writers to improve the UX of our daily content workflow and remove the complexity of actually writing.
Collaborative Authoring
Same-page authoring and team draft links. Designed from the ground up to improve the collaboration between writers, developers and the entire organisation.
Version Control
Maintain your content in a dedicated repository with powerful search and tagging plus the security of full version control. Freedom from duplicate files or ambiguous version names.
Structured authoring
Modular content publishing allows you to choose your flavour of topic-based authoring and single sourcing to maximise content re-use. No more dead-end wikis.
Private team content
Your internal documentation has never been more discoverable or dynamic. Company-wide private documentation or role-specific guides for new hires or reporting in just a few clicks.
Documentation hosting
Unlimited documentation hosting with the option of custom domain, integrated publishing to external services or self-hosting. Write once and publish anywhere.
tool  writing  editor 
june 2017
Spoken Layer
SpokenLayer's platform makes written content come alive every day through the power of the human voice for the world's largest brands.
podcast  audio  books  content 
june 2017
ORY Editor
 ORY is a company building and maintaining developer tools for a safer, more accessible web. You might also like our other Open Source tools! The ORY Editor is a smart, extensible and modern editor ("WYSIWYG") for the web written in React.

The ORY Editor was written because we urgently needed a robust and modern content editing solution for our open education platform serlo.org. Serlo is the largest open education platform in Germany, works like the Wikipedia and is used by millions every year.
text  editor 
may 2017
Here’s the growth hack: Send the same email campaign to everyone that didn’t open your email 7 days later with a new subject line. That’s it. That’s the “secret” to increasing email open rate. Double-opens is that fucking simple.
email  marketing 
may 2017
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