graph

Oh heck - I'm gonna put something of mine up here. This is a tree drawing container for WPF and the sources. It also has a generic tree positioning assembly which the WPF control is just a bit of a wrapper over and could be used wherever you want to do any sort of tree drawing. I haven't seen this algorithm put up in too many places, so thought maybe somebody might appreciate it.

Interesting demo app for the Google Social Graph API

This sounds like a very cool visualization site - can't wait to try it.

Quoted: An experimental Web site allows users to upload the data they want to visualize, then try sophisticated tools to generate interactive displays.
...
The Many Eyes site, begun in January 2007, offers 16 ways to present data, from stack graphs and bar charts to diagrams that let people map relationships. TreeMaps, showing information in colorful rectangles, are among the popular tools.

About www.many-eyes.com and others

Quoted: PEOPLE share their videos on YouTube and their photos at Flickr. Now they can share more technical types of displays: graphs, charts and other visuals they create to help them analyze data buried in spreadsheets, tables or text. An experimental Web site allows users to upload the data they want to visualize, then try sophisticated tools to generate interactive displays.

QGet the most detailed and concise statistics and reports about your Cube Cart shop performance. Visualize your selling history, including the period backward to the moment your shop went online.

Quoted: Chart Chooserを使えばデータをどう説明したいかを選ぶと最適なグラフの種類を教えてくれます。分布も説明したいし、比較もしたい、といった複雑な説明をする場合にも迷わずに「これ！」というグラフを選ぶことができます。

Excel で面グラフ。

Quoted: フリーのグラフスクリプト１０個が特集されてました。
JavaScriptやFlash製のグラフを使う際の選択肢として使えます。