Z64K (2019/03/17) 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:
17 March
Fixed case where frame wasn't detected during frame skip that could freeze emulator. Also added timeout value in unlikely case frame is never detected during skipping of frame.
Added frame skip (ALT-F while emulator paused) and fixed bug when starting monitor for first time when emulator is paused

Download: Z64 (2019/03/17)
Source:Here