resources tagged with "how to" 
Processing.js
A JavaScript version of the Processing visualization language. By John Resig.
tags: tools visualization how to
Prefuse Visualization Toolkit
Free set of tools for creating rich interactive data visualizations.
tags: tools visualization how to
Flowing Data
Blog that explores how statisticians, designers, computer scientists and others are using data to help us understand more about ourselves and our surroundings.
tags: blog visualization how to
Flare Visualization Toolkit
A collection of ActionScript 3 classes for building interactive visualizations on the web.
tags: tools visualization how to
Graphviz
Open source graph visualization software with a web interface.
tags: tools visualization how to
Processing
Open source programming language and environment for programming images, animation and interactions. Often used for data visualization.
tags: tools visualization how to
theinfo.org
Excellent resource on the ins and outs of dataset handling. A place to exchange tips and tricks, share tools and integrate projects. Join the mailing lists.
tags: how to