Z64K (2019/04/17) 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 April
Removed doubling up of 1541 debugging output when using C128 emulation.
Include drive CPU state at top of Machine Monitor when debugging device 8:
Allow Machine monitor to assemble to device 8.
Disassembly window is refreshed when assembled code falls in range of what is displayed in the window.
Fixed some Machine monitor debugger output for 1571 when drive is in 2 Mhz mode.
When a breakpoint is trigger, correct CPU is shown by default when entering theMachine Monitor.

Download: Z64 (2019/04/17)
Source:Here