Paul Robson's A26 DOS based open source emulator. http://members.aol.com/autismuk/emu.html

StellaX Windows 9x, NT and 2000 port of Stella. http://www.emuunlim.com/stellax/

z26 An open source emulator for DOS, Linux, and Windows based on Paul Robson's A26. http://www.whimsey.com/z26/

PCAE An open source emulator for DOS and Windows, written in Pascal/Delphi. http://pcae.vg-network.com/

Atari 2600 Emulator for GBA Emulation project for Game Boy Advance with details and screenshots. http://www.otakunozoku.com/gbavcs/

Stella An open source emulator for DOS, Linux, MacOS, Unix, and Windows. http://stella.sourceforge.net/

Dan B's Atari 2600 Tech Page An open source emulator (Virtual VCS) for DOS and technical information. http://atarihq.com/danb/a2600.shtml

Imdylanks Atari Roms A collection of ROM Images packed in three files. http://www.geocities.com/imdylank/user.html

Atari VCS Preservation Retrogaming Archive 514 ROM Images in one zip file. [Requires Flash] http://atarigamer.tripod.com/

Acorn Virtual 2600 Emulator port for Acorn RISC OS. http://www.mnementh.co.uk/v2600/

Virtual 2600 Historical look at Alex Hornby's Virtual 2600 emulator. Virtual 2600 is an open source emulator for DOS and Unix. http://www.hornby.dsl.pipex.com/v2600/

AtariAge: 2600 Emulation Resources and links to the most popular emulators and utilities. http://www.atariage.com/2600/emulation/

Holme's Atari 8-bit Games Includes emulators and ROMs for 2600, 5200, 7800, and Lynx platforms. http://homepages.paradise.net.nz/atari/