via http://www.aep-emu.de/

2600.emu is a commercial Android port of the Atari 2600 emulator Stella 3.5-svn.

Quote:
  • Minor bugfixes to the config file and turbo code
  • On-screen controls auto-hide when Xperia Play gamepad slides out
  • Added paddle control support via the existing joystick controls
  • Added support for internal ROM database to detect parameters (fixes games like Dig Dug NTSC)
  • Fixed Galaxian graphics