From the Mednafen homepage:
Mednafen is a portable, utilizing OpenGL and SDL, argument(command-line)-driven multi-system emulator. Mednafen has the ability to remap hotkey functions and virtual system inputs to a keyboard, a joystick, or both simultaneously. Save states are supported, as is real-time game rewinding. Screen snapshots may be taken, in the PNG file format, at the press of a button. Mednafen can record audiovisual movies in the QuickTime file format, with several different lossless codecs supported.
|Downloads||Windows||Mac OS X||Linux||Android|
|Windows build, source code, and release notes||✓||✓* Source code|
|Mac OS X build with NekoLauncher GUI||✓|