Is there any other open source prototyping platforms other than the arduino or basic stamp that is still just as good? Answered

There isnt really a specific project i'm planning just wondering what else is out there in the world of open source platforms.

Why are the arduino and stamp not suitable for your project?  Isthere a specific feature you need that they are lacking?

  the propellor from parallax is nice... it uses its own language called spin. 

the maker controller is nice also, however it is ~ $100.