Z64K (2022/07/03) is released. Pixel exact emulation of the Commodore 64, VIC 20 and Atari 2600 written entirely in Java. The emulators should run on any platform with an updated java runtime environment installed.

Z64K Changelog:
Fixed bug that caused emulator to crash on exit with older versions of saved config
Include SID Analyzer in version 2 of Z64K.
F1 = Toggle voice 1 ON/OFF
F2 = Toggle voice 2 ON/OFF
F3 = Toggle voice 3 ON/OFF
F4 = Toggle voice 4 (volume samples) ON/OFF
F5 = Display waveform
F6 = Display envelope
F7 = Display oscillator
F8 = Display combined
F9 = Pause (press F5-F8 to un-pause)
F11 = speed down
F12 = speed up
Decommission version 1 of Z64K.

Download: Z64 (2022/07/03)
Source:Here