Some stuff I could not place elsewhere:

Some assignments I wrote for the local 'young electrinics' club (12-18y) to get the kids started with a 16f84 and Jal.

WBus: a multi-drop RS232 bus. Used (more or less) by Wisp and WLoader.

WireRunner: probably the most simple robot-like thing you can build. Runs just back and forth on (or rather under) a wire.