A gamemode I just recently finished. It's a prop surfing race. It uses the Fretta gameode base so if you have the GMod beta, I recommend you use it there.
Here's the facepunch thread for Prop Race: http://www.facepunch.com/showthread.php?t=685285
Here's the facepunch thread for Fretta: http://www.facepunch.com/showthread.php?t=702614
It is now on the official Facepunch Fretta test server where you can vote for it at the end of the game.
I have my own test server as well for it:
I may not make any changes to it because I am currently working on the projector SENT and a new fretta gamemode as well.