Z64K Beta (2016/04/11) 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 (2016/04/11) Changelog:
* Fullscreen mode - ALT-ENTER toggles. Should be more stable than currently released version.
* New setting menu. Can configure CIAs and fullscreen settings. More to come.
* The following points are the minimal list of things still TO DO before new C64 emulator comes out of BETA and replaces the existing released version. I already have the code complete for most of these features. I just need to implement them into the new emulator. I have a lot more new features planned for the emulator once it comes out of Beta stage.
- Multiple drive support
- Complete cartridge snapshot support
- Variable cpu speeds
- Proper Manual
- Option for PC keyboard mapping
- Joystick configuration in menus - Currently F11 switches joystick port
- Mouse support
- Improved Monitor/Disassembler
- UUdecoder
- Improved full screen support - currently screen sometimes becomes corrupt. Just exit and re-enter full screen mode to fix for now.
- Any other feature I might have missed that exists in the currently released version
- Testing, testing and more testing. :)

Download: Z64K Beta (2016/04/11)
Source:Here