TOSBOX homepage  
   A shareware emulator for DOS.
   http://www.geocities.com/tosbox/

Rainbow  
   Shareware Atari 400/800/800XL/130XE/5200 emulator for MacOS and Win32.
   http://www.chrislam.co.uk/

The CTH Emulator  
   An Atari 8-bit emulator that supports Winsock 1, OSS Supercarts and has better Sparta Dos support.
   http://cth.dtdns.net/Emulator/CTH_Emulator.html

Atari++  
   An open source 130XL, 400, 400XL, 800, 800XL, and 5200 emulator for Unix and Windows.
   http://www.math.tu-berlin.de/~thor/atari++/

Atari800  
   An open source 800, 800XL, 130XE and 5200 emulator for BeOS/x86, DOS, Linux, TOS, Unix, Windows, and Windows CE.
   http://atari800.sourceforge.net/

Atari 800 Emulator for the Mac  
   Macintosh port of David Firth's Atari800 emulator.
   http://www.serve.com/derekl/atari/atari_emu.html

Atari800MacX  
   MacOS X port of the Atari800 emulator.
   http://members.cox.net/atarimac/

Atari800Win  
   Atari800 port for Win32
   http://www.cris.com/~Twist/atari800win/

Atari800Win PLus  
   Windows port of Atari800 based on the original Atari800Win v2.5c sources.
   http://atariarea.histeria.pl/PLus/index_us.htm

Rainbow/Mac  
   A MacOS X port by Richard Bannister of Rainbow.
   http://www.bannister.org/software/rainbow.htm