Altirra

Altirra is designed with emulation quality in mind, sometimes over speed and polish.

ARAnyM

ARAnyM is a software virtual machine designed and developed for running 32-bit Atari ST/TT/Falcon…

This is the the Macintosh OSX Port of David Firth’s Fantastic Atari 800 Emulator.

Windows port of Atari800 based on the original Atari800Win v2.5c sources.

Atari TOS emulator offering the MagiC multitasking OS, running on macOS

Hatari is an Atari ST emulator for Linux and other systems that are supported by the SDL library.

Atari ST emulator for Android based on Hatari.

Javatari is a multiplayer Atari 2600 emulator written in pure Java with no external libs.

PCE is a collection of microcomputer emulators. At the moment it contains three emulators:

The ProSystem Emulator is an Atari 7800 emulator for the PC and Windows OS.

Steem is an open source Atari STE emulator for Windows and Linux.

Stella is a multi-platform Atari 2600 VCS emulator released under the GNU General Public License…

Z26 is one of the best emulators for the Atari 2600.

jGameBase is a fully-featured retro-gaming emulator frontend and game database utility.