LMAX's "Disruptor" concurrent-server pattern, claiming to be a higher-throughput, lower-latency, and lock-free alternative to the SEDA pattern using a massive ring buffer. Good discussion here at SO. (via Filippo)

the innards of Spotify's client, server fleet, and P2P layer, from the dev team themselves. good stuff

'an online service that enables you to look up the configuration of any public SSL web server. The configuration of known public SSL web servers will be periodically inspected and the results recorded. This service relies on the SSL Server Rating guide for the assessment'