Micro64 v1.00.2011.11.25 Build 637 is released. Micro64 is a freeware commodore c64 emulator. Currently micro64 has two different VIC II emulation modes: cycle exact (default, works fine) and half-cycle exact (next-gen, rudimentary implementation – currently damn slow).

Micro64 v1.00.2011.11.25 Build 637 Changelog:
- Updated floppy sounds
- Updated 1541 sound engine
- Added faster second 1541 true drive emulation without mechanics emulation (motor spin up/down time, head seeking time, and so on) as optional option for slower computers
- micro64ide has his own config file now

Download: Micro64 v1.00.2011.11.25 Build 637
Source: Here