OpenType font to display charts/graphs using ligatures. 'Designed by Travis Kochel, FF Chartwell is a typeface for creating simple graphs. Driven by the frustration of creating graphs within design applications and inspired by typefaces such as FF Beowolf and FF PicLig, Travis saw an opportunity to take advantage of OpenType technology to simplify the process. Using OpenType ligatures, strings of numbers are automatically transformed into charts. The data remains in a text box, allowing for easy updates and styling. It’s really easy to use; you just type a simple series of numbers like: ‘10+13+37+40’, turn on Stylistic Alternates or Stylistic Set 1 and a graph is automatically created.' (via Simon)

sparklines in your terminal window. Simply give it a comma or space-separated list of data values, and it'll generate an ANSI-graphics sparkline chart. Brilliant! (via mjd)

'The system demand displayed here represents the electricity production required to meet [Irish] national electricity consumption, including system losses, but net of generators' requirements. It includes power imported via the interconnector and an estimate of the power produced by wind generators, but excludes some non-centrally monitored generation (i.e. small scale CHP).' via Juan Flynn

'an open source JavaScript library that produces produces interactive, zoomable charts of time series. It is designed to display dense data sets and enable users to explore and interpret them.' quite pretty

good HN thread on better charting tools in JS