Tell us about yourself!
I know this is a little late to the party, but the same people that make SolidWorks (Dassault Systemes) offers a program called DraftSight for free and it is basically an AutoCad replica.
ArduDroid: A Simple 2-Way Bluetooth-based Android Controller for Arduino RGB led strip
Raspberry Pi Arcade Table
How to make a fractal antenna for HDTV / DTV plus more on the cheap
DIY 1000 watt wind turbine