VisualJockey: Real-time Animation
The Mac may be in the spotlight these days, but Windows may boast the broadest access to freeware and open source tools for live visuals. The latest edition: VisualJockey. Blending patching, performance, and timeline metaphors, with a healthy dose of effects and sound capabilities, VisualJockey is a unique tool you can now have [...]

It is the Season and now there is a new Interactive Snowflake Maker for Quartz Composer. You can download the Quartz Composer patch here. Just open it up and drag your mouse over the output window to make beautiful snowflakes.