Chaoscope

I love this program that uses attractor mathematics and applies them to particle fields. Check it out at http://www.chaoscope.org/

Here's some of my own:

The MacGyvers of the Developing World

http://www.afrigadget.com/

This is a design/engineering/innovation site I've been following for quite some time now. The site references Africa in particular, but its dedicated to ingenuity throughout the devloping world. Interesting stuff - take a look.