Here are some of the hardware and Free Software projects with which I’ve been involved.

Drogon Quadcopter The Drogon Quadcopter is a multi-rotor (4) flying robot controlled by an Arduino and Raspberry Pi.
GarageKeypad Arduino-controlled garage door opener project.
GrubConf A Gnome2 based GRUB configuration editor.
LlamaChat A free, open source, web-based chat server/client pair.
Code Connector Software that gives developers the ability to code collaboratively via the Internet in a highly productive and efficient way.