#3DFPFB 3DFPFB stands for 3-Dimensional First Person File Browser. Long story short, it turns whatever folder you start it in into a world that you can walk around and explore. To open a file (or in future, a directory) just run into it.
This is based on Mark Overmans' 3D FPS example.
To compile it you will need either the Enigma Compiler or Game Maker:Studio (I have not tried compiling it on Studio but it should work). The precompiled binary should work though.