Versatile Commodore Emulator
VICE is an emulator collection which emulates the C64, the C64-DTV, the C128, the VIC20, practically all PET models, the PLUS4 and the CBM-II (aka C610). It runs on Unix, MS-DOS, Win32, OS/2, Acorn RISC OS, BeOS, QNX 6.x, Amiga, GP2X or Mac OS X machines.
Seguro Distributor aims the design of an efficient algorithm that allows the safe distribution of public files, i.g., executables and source code. Files are decryptable with a public key, which is generated by a private key.