Awesome list of Atari resources

Atari Archives, atariarchives.org makes books, information, and software for Atari and other classic computers available on the Web

AtariWiki, The AtariWiki is a collection of Information about the Atari 8-Bit computer line mainly intended for programmers. It covers topics specific to the Atari 8-bit computers, but also generic programming topics like the 6502 line of processors, pProgramming languages available for the Atar8 8-bit machines and generic programming tips and tricks

mads, Assembler and Pascal comiler

ASAP, ASAP is a player of Atari 8-bit chiptunes for modern computers and mobile devices

xebin, Atari XL/XE Binary File Utility

xedisk, Atari XL/XE Disk Image Utility

fastbasic, FastBasic - Fast BASIC interpreter for the Atari 8-bit computers

Fusion-Forth, A Forth interpreter/compiler and IDE for Atari ST

libcmini, small footprint C standard library for Atari ST and m68k-atari-mint cross compiler toolchain

8bit-unity, 8bit-Unity is the cross-platform C language SDK for the CC65 compiler, which allows writing your game only once, and then deploy it on all those platforms

Atari8GUI, A Graphical OS for the Atari 8-bit

Renderific, An SVG renderer for Atari 8-bit computers, written in Turbo-BASIC XL

Video, everse engineering Atari 8-bit video

sio2arduino, is an Atari 8-bit (800/XL/XE) device emulator that runs on the Arduino platform

Altirra, Altirra, an 8-bit Atari computer emulator

Atari 800, Atari800 is the emulator of Atari 8-bit computer systems and 5200 game console for Unix, Linux, Amiga, MS-DOS, Atari TT/Falcon, MS-Windows, MS WinCE, Sega Dreamcast, Android and other systems supported by the SDL library

Atari++, The Atari++ Emulator is a Unix based emulator of the Atari eight bit computers, namely the Atari 400 and 800, the Atari 400XL, 800XL and 130XE, and the Atari 5200 game console

javatari.js, Javatari - Online Atari 2600 Emulator

Sim2600, Visual6502.org transistor-level simulation of the Atari 2600 game console

Hatari, Hatari is an Atari ST/STE/TT/Falcon emulator for GNU/Linux, BSD, Mac OS X, Windows and other systems which are supported by the SDL library

Arkos-Tracker-2-ST, Atari ST version of the replay source for Arkos Tracker 2

Atomchess-6502, Toledo Atomchess for Atari VCS/2600

emutos, EmuTOS is a Free operating system for Atari ST computers, and more

freemint, Unix-like kernel for Atari ST and compatible computers

pop-a8, Prince of Persia port to Atari 8-bit

Atari_ST_Sources, A large repository of Atari ST (and family) source code