Linerider 2 Unbound is out! And I bought it! New features? Spline tool to make perfectly smooth track. Background tool with layers to make a 3D looking world. Track coloring, game mode, free-design mode, on and on and on. It's a huge program (2GB of free disk space) for the computer I'm using it on, but it still seems to work okay. Local installation allows for offline editing, saving, etc., and it even has uploading and video capture capability! Sounds..I could really go on and on!! It is rather amazing.
They're online user account tool even has been integrated with the new version of the game so that if you do an upload in-game, it will be reflected in your online profile. Also, you can download other's tracks from the website and they will go directly into your game with a few extra steps in between.
Alright..on to more useful information. My Linerider profile is at http://linerider.com/en/user/depwl9992. AND, if you want to see sample videos, I've created a Youtube playlist of most all my Linerider tracks, viewable here.