| PearPC | | An open source PowerPC emulator for Unix and Windows. |
| Project8080 | | Covers the development of a Heathkit H8 emulator on Macintosh. |
| SIMH | | An open source collection of emulators for Windows of historical computers, including GRI-909, HP 2116/2100/21MX, IBM 1401/1620/1130/System 3, PDP-1/4/7-11/15/VAX. Also provides software kits, system photographs, and technical papers. |
| Solace | | An open source Sol-20 emulator for Windows. |
| SPRINT | | A freeware Sprinter emulator for Linux/i386 and Windows. |
| st20emu | | A freeware ST20 emulator for DOS. |
| TinyELF | | A freeware emulator of CDP1802 based microcomputers for Mac OS X. |
| Virtual Alpha Micro | | An open source AM-100 micro computer emulator for Cygwin, Linux, and Mac OSX. |
| vmips | | An open source MIPS R3000 emulator for Unix. | |
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