Soul Force! v1.00
A fairly standard waveshaping distortion plugin, made more interesting through the use of feedback to control the shaping. Can get pretty loud and obnoxious. The GUI was done in Blender, and you can find the .blend file in the source code zip. (C++)
Note: The OSX universal binary (and XCode project files in the source code zip) are graciously provided by Bernie Torelli at Nomad Factory.