The C64 Arcade Launcher is a nice interface (Frontend) allowing you to play 360 Commodore C64 games in a single installation. Complete with its own menu and inbuilt instructions. This launcher contains the best of the C64 game library and has the will to be continually updated with the addition of new games, either at random or as requested.
The big advantage of this frontend is that it allows you to launch a C64 game in 1 click without worrying about configuring an emulator (it is still necessary to be able to configure the controls). It is based on the Vice emulator, a benchmark for C64 emulation.