RetroArch is a frontend for emulators, game engines and media players.
Virtualization software for x86_64 hardware
Versatile Commodore Emulator
A multi-purpose emulation framework
Run Windows applications on Linux, BSD, Solaris, and Mac OS X
Transfer disks and disk images between the Apple II and the real world
Create your own Atari tapes
Software development for 4Mb portable, using Z80 CPU and AA batteries
Builds of "FUSE" emulator with my own mods
a multiplatform, full-featured GameBoy classic emulator
E-UAE Amiga emulation PowerPC JIT compiling implementation
Scriptable frontend for media applications.
Cross-platform Apple //e emulator
Upload games to legacy apple // computers via serial and no floppies!
z390 Portable Mainframe Assembler and Emulator
Apple1 Emulator for the terminal with cut and paste.