EMU7800
EMU7800 is an Atari 7800 ProSystem emulator developed by Mike Murphy. It runs on Windows, and versions have also been released for Windows Phone and Android. It is written for Microsoft’s .NET platform, which made it easy to port to Microsoft’s other platforms.
EMU7800 runs well on most hardware and is compatible with the vast majority of Atari 7800 games.
Its most recent versions mainly bring the emulator to more platforms rather than change the core emulation, which suggests the core is already mature.
As well as the Atari 7800, EMU7800 also emulates the Atari 2600.