RetroArch is a frontend for emulators, game engines and media players.
Versatile Commodore Emulator
A multi-purpose emulation framework
Run Windows applications on Linux, BSD, Solaris, and Mac OS X
Binary Modular DataFlow Machine (BMDFM)
Amiga Emulator (UAE) for AROS
Software development for 4Mb portable, using Z80 CPU and AA batteries
Transfer disks and disk images between the Apple II and the real world
Teo is an emulator of the Thomson TO8 microcomputer
Full Smart Card support for Wine
E-UAE Amiga emulation PowerPC JIT compiling implementation
Cross-platform Apple //e emulator
Upload games to legacy apple // computers via serial and no floppies!
z390 Portable Mainframe Assembler and Emulator