Gopher2600 v0.53.0 is released. Gopher2600 is an emulator for the Atari 2600. Whilst the performance is not as efficient as some other emulators it is none-the-less suitable for playing games, on a reasonably modern computer, at the required 60fps. (The development machine for Gopher2600 has been an i3-3225, dating from around 2012.)

Gopher2600 changelog:
ELF
implemented vcsPha3(), vcsRead6() and vcsNop3()
added non-volatile memory
Keyportari
implemented 24char and ASCII protocols
set with -keyportari command-line option
or in the peripherals window of the debugger
uses system language settings for keyboard layout
TIA
hardware collisions only take place during non-VBLANK period
Bug Fixes
-left and -right options reapplied on cartridge reload
reloading the cartridge too often could cause the emulator to hang

Download: Gopher2600 v0.53.0
Source:Here