Z64K Beta (2017/07/19) 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 Beta Changelog:
19 July - C128 Beta
Fixed bug that didn't enable c128 extended key functionality on startup
18 July- C128 Beta
Fixed bug that wasn't properly soft resetting c128 into c128 mode from c64 mode. Soft reset will always reset to c128 but retain memory contents.
17 July - C128 Beta
Version b - fixed xscroll bug with bitmap images introduced with the "Fixed VDC X Smooth scroll change.." on 15 July. Fixes High Resolution Mega Tech Tech part of VDC version of RFO
If emulator is in C64 mode, a soft reset will reset to C64. (this was only temporary while I fixed a bug that wasn't properly configuring c128 back to c128 mode from asoft reset) Hard reset always resets to C128 mode.
16 July - C128 and C64 Beta
Config file saves VICII type, CIA type and default directory for tape, and prg files.
Included if VICII type is NTSC or PAL in chipset settings menu.

Download: C128 Beta (2017/07/19)
Download: C64 Beta (2017/07/16)
Download: VIC20 Beta (2017/07/01)
Source:Here