Z64K (2019/04/29) 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:
29 April
Emulator runs at correct speed after host computer resumes from sleeping.
Fixed bug caused by last update to Ocean cartridge that prevented Shadow of the beast working.

Download: Z64 (2019/04/29)
Source:Here