I am Douglas Tarlow

The definitive guide to open source hardware projects in 2008 — Make Magazine

From open source GPS trackers, to DIY MP3 players, absolutely worth checking out. I’ve added more than a couple to my queue.

http://blog.makezine.com/archive/2008/11/_draft_open_source_hardwa.html

DIY Drones: The Open Source UAV Community

This is a site for all things about amateur Unmanned Aerial Vehicles (UAVs): How-to’s, videos, discussion and more (you can read more about us here). Please use the tabs above to navigate the site.

http://diydrones.com/ (also the best looking ning site I’ve ever seen)

Update:

I’d like to give an honorable mention to http://harkopen.com

They are on my list to check out, I haven’t explored their site yet, but I wouldn’t want to leave them out as I’ve heard great things about them.

Also on my “to check out” list http://www.adafruit.com

And www.sparkfun.com is an all around awesome site for sourcing some of these techs.

Any other great sites that I’m missing?

p.s. 100kgarages sounded like one of the coolest ideas I’d heard when I read about it on springwise, but I was very disappointed when I visited their site.