I found Endless Sphere after seeing Boosted Boards do their TED talk, and decided to make my own


Before that, I had built my own Segway, an electric go kart, and other crappy robotics projects.
Recently my brother in law was talking about race car simulators, and I found the excellent forums XSimulator - http://www.xsimulator.net/community/. I now have a super fun motion chair linked to some racing games.
I'm also a coder, and tinker with 3D, so I got an Oculus Rift (DK1) a while back. This is super fun especially when strapped into a moving chair and playing rally games like Dirt 3

What other projects and forums do you guys visit or make?