Emu64 is a Commodore 64 Emulator that supports emulation of the floppy VC-1541-II, Datasette VC-1530, CRT cartridge extension, andREU 1764 (2MB).
Supports most C64 formats and appears to have excellent compatibility.
There is a somewhat outdated wiki available at https://www.c64-wiki.de/wiki/Emu64. It is written in German but translates well with Google Chrome (Right click ... translate to ...)