Stella v6.5.1 is compiled. Stella is a multi-platform Atari 2600 VCS emulator. The Atari 2600 Video Computer System (VCS), introduced in 1977, was the most popular home video game system of the early 1980's. Now you can enjoy all of your favorite Atari 2600 games on your PC thanks to Stella!

Stella v6.5.1 changelog:
Just a quick bugfix release, addressing issues on the Retron77 port:
Fixed paddle button bug for jittering controllers.
Improve switching between joysticks and paddles on Retron77 port.
Improve memory usage on Retron77 port.

http://www.emucr.com/2021/01/stella-v651.html