Variance
A charting library that works the way the web does. Structural, semantic elements of a chart are defined entirely within HTML. Visual aesthetics are handled by CSS. Data can be brought in from CSVs and JSON endpoints via link tags. At no point are you forced to write any JavaScript whatsoever.
Visage
Visage is a new tool to help you automate the boring parts of creating infographics and reports. It is a workhorse for the tedious tasks otherwise done by hand in Illustrator - changing color schemes, setting up templates, updating data and revising layouts.
Lyra
An investigation of Jim Vallandingham's tutorial for Lyra, an open source visualization tool developed by Arvind Satyanarayan at UW Interactive Data Lab.
RAW
Raw is a new web-based tool developed by Density Design to fill the gap between spreadsheets and vector graphics.
Google Databoard
Google Databoard, the latest in a series of data presentation tools from the company, is focused on sharing the contents of its research reports.
FF Chartwell
Instead of replacing number sets with glyphs using OpenType, FF Chartwell for the web abstracts the idea of a “font” again and renders the charts using a series of javascript libraries.
Sigma.js
Network visualization is a topic as complex as many of the hairballs it produces but Sigma.JS is designed to break through the clutter and graph networks that are more readable and user-friendly.
Bubble Tree
Created originally for the OpenSpending project, Gregor Aisch' developed an open source tool to flexibly visualize data sets with a hierarchical structure.