Wired the TMDS lines from the LCD to a new DVI port on the back. Replaced the innards with an ATX PSU (original was unusable), case fan, and some subtle blue LEDs. http://www.dremeljunkie.com/2011/08/guide-step-by-step-17-imac-g4-tmds-to.html
Modded Enterprise era toy phaser with green laser diode.
Built for contacting the space station and other ham satellites on 144 Mhz. Has a tripod mount and a smartphone holder for aiming using VR apps.
I like to drive with all the windows and the sun roof open and got tired of holding down all the buttons, so I made a circuit to open and close everything automatically. (http://youtu.be/xSr3egoyMVE)
A clone of NetFungus for Android. Sort of like a combination between Tetris and Reversi. The goal is simple; engulf your opponents before they eat you. (https://github.com/unlimitedbacon/kfungus)
Based on the infamous Portable Dog Killer by Steve Gibson (http://twit.tv/sn/281). Basically its a 555 with, an amp, a tweeter, and a knob for adjusting the frequency from 15 - 20 Khz. Causes instant pain in younger siblings.