Atari 2600 Emulator for SDL & the X Window System

 Stella is a portable emulator of the old Atari 2600 video-game
 console. You can play most Atari 2600 games with it.
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 Stella's features include:
  * emulation of Atari 2600 joysticks, keyboards, paddles and driving
    controllers using the host system's input peripherals;
  * emulation of trackballs, joysticks, booster grips, driving
    controllers and the Amiga Mouse using the host system's mouse;
  * support for real Atari 2600 controllers using the Stelladaptor,
    2600-daptor or 2600-daptor II;
  * support for real Atari 7800 controllers using the 2600-daptor II;
  * support for the speech portion of a real AtariVox device;
  * support for Supercharger single-load and multi-load games;
  * emulation of CRT TV features, including texturing, colour bleed,
    RF noise and phosphor burn-off (requires OpenGL).
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 An extensive debugger is included, with the Distella disassembler.
 .
 Note that this is not isee systems' STELLA modeling, simulation and
 analysis tool.