Yorg, a free and open source racing game currently in development that seems promising is going to get a big update soon with a number of new features and improvements.
Coming for the 0.11 release will be local multiplayer, particle effects, gamepad support, a reimplementation of the online multiplayer UI, AI improvements, performance improvements and more. Sounds like it's going to be a pretty huge release!
They even showed off some screenshots of the new local multiplayer feature:
Hopefully the multiplayer UI changes will give us a better experience than last time, which really wasn't great. To be fair, their main developer did comment then about making changes so I'm keen to see the improvements. They have a promising start to what could result in a fun racing game, it just needs plenty of polish.