I'm making some small kind of racing game (submitted it too), but I'm not really good with graphics so it doesn't look all that fancy.
As for the software/libraries I'm using:
- Blender (3D meshes, some textures)
- GIMP & Pinta for the other textures
- BMFont (generated a bitmap font of Roboto with this, runs over wine)
- Assimp
- SDL2
- The D Programming Language
- Avocado (small game library/engine by me and a friend)