AutoTileSet, the Unity/GameMaker/Construct plugin for AutoTileGen is now included with AutoTileGen.
If you already had AutoTileGen, AutoTileSet will be distributed as an update.
You can find AutoTileSet project files in your AutoTileGen local folder and copy them to your gamedev project (library->rightclick on autotilegen->properties->local files->browse local files).
If you don't know AutoTileSet, you can see it in action here:
http://store.steampowered.com/app/313320