Gopher2600 v0.19.1 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 v0.19.1 changelog:
Makefile
Apple Macs with an ARM chip will no longer use freetype font rendering
when built with the build or release targets
see issue #19
Display
changed relationship between the frame rate limiter and monitor
synchronisation. this may result in a performance improvement on some systems
uncapped FPS no longer uses input buffer. this resulted in choppy visuals
fixed visual bug seen when switching from playmode to the debugger when
one or the other mode had a "maximised" window
TIA
missile sprites were not plumbed to player correctly after gameplay
rewinding. this affected missiles that rely on RESMPx for positioning
Rewind
joystick and gamepad controllers resume from a neutral position after
gameplay rewind
ARM Developer
statistics more carefully collated during rewinding to avoid spikes in
the data
CRT effect
added rounded corners option

Download: Gopher2600 v0.19.1
Source:Here