Free drawing software for Windows, Mac OS X, and Linux
Dia Diagram Editor is free Open Source drawing software for Windows, Mac OS X and Linux. Dia supports more than 30 different diagram types like flowcharts, network diagrams, database models. More than a thousand readymade objects help to draw professional diagrams. Dia can read and write a number of different raster and vector image formats. Software developers and database specialists can use Dia as a CASE tool to generate code skeletons from their drawings. Dia can be scripted and extended using Python.
StormDraw is a cross-platform, light weight diagramming tool, available under Windows, Linux, Mac OS. It is fast, professional, and easy to use. You can draw beautiful flow charts, organization charts, network charts in minutes. Give it a try!
*** THIS PROJECT IS DEAD ***
But try http://drawpile.net/ instead! It's also open source and has made a 1.0 release.
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CjopazeDraw is a real-time Internet collaborative drawing tool in the vein of openCanvas, pchat, or flockdraw, but designed with full cross-platform thick-client graphics tablet support, fast synchronising, and per-user undo and redo.
A small but very useful vector graphics drawing program. A picture can be drawn by multiple people simultaneously over a network connection. If you know how complicated it is to explain something via instant messaging, you know why you need this tool.