Phoinix is a free Nintendo Gameboy(TM) emulator, it is capable of running most free and commercial cartridges.
Since this is a Open Source project under GPL (GNU General Public License), all source code is available.
The archive file you're gonna load down is just a starter kit. Please visit the homepage for full information.
You'll find links to sites with free Gameboy games, documentation how to convert them, and mailinglists to subscribe.
- Well, there was a small error preventing the deletion of saved states, if the games is stored on an external memory card, and you switched to another game after the deletion. If you launched the game, the states were deleted correctly.