DOSEMU Main Page  
   DOSEMU stands for DOS Emulation, and is a linux application that enables the Linux OS to run many DOS programs - including some DPMI apps.
   http://www.dosemu.org/

UAE - The UAE Amiga Emulator  
   UAE is a mostly complete software emulation of the hardware of the Commodore Amiga 500/1000/2000. A Commodore Amiga, for those who don't know, is a 16/32 bit computer system based on the Motorola 680x0 CPU and a few specially designed custom chips t
   http://www.freiburg.linux.de/~uae/

DarcNES  
   DarcNES emulates a number of different older systems under Linux quite well. Currently emulated are NES, SMS, GG, PCE, SG1000, and Coleco Vision.
   http://www.dridus.com/~nyef/darcnes/

Linux Consultant  
   Color Computer utility package for Linux emulators Includes "cocodisk" to extract files from an emulator DSK file, and "DiskTape" to convert BIN to CAS format
   http://pcisys.net/~brihall/

oTOSis  
   oTOSis, formally known as tosemu, is a TOS/MiNT emulator which makes it possible to run pure TOS/MiNT programs in Linux/m68k. oTOSis uses oCPUis, to emulate the m68k CPU, if you run oTOSis on a different platform than m68k
   http://osis.nocrew.org/otosis/

a386  
   a386 is a C programming library which provides an abstraction of privileged CPU instructions.
   http://www.nocrew.org/software/a386/

Getting Basilisk II-Linux Up and Running  
   A tutorial on how to install Basilisk II (a Mac emulator) on Linux!
   http://www.kearney.net/~mhoffman/basiliskII/system753_tutorial/linux/index.html

Mac-on-linux  
   An Open Source emulator under the GNU GPL, runs MacOS on top of LinuxPPC.
   http://www.maconlinux.com/