I've found several cool sims in the latest freebie hunt.
The pics below are from a sim called Hellraiser. The sim is for motorcycles only, no cars allowed, and features a biker bar, roads to ride on, and a shop that sells roadsters. You can pick up a free demo bike in the shop and ride it around the sim.
No cars allowed here!
I'm a VERY good driver... dad lets me drive slow in the driveway on Sundays...