Z64K Beta (2018/07/15) 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 when attempting to set 2nd C128 screen to Full screen mode. Either main screen or 2nd screen can be set to full screen using ALT-ENTER for c128.
Minor improvements to toggling full screen mode. Action happens in same thread as renderer.
Disable repaint of bottom panel when in exclusive Full screen mode. Fixes flickering of bottom put of screen during disk activity when -Dsun.java2d.d3d=false option is used at command line.

Download: Z64 Beta (2018/07/15)
Source:Here