Contains emulators for many different computers and calculators/PDAs for many different platforms. [English/Italian]
Windows 9x/NT GUI emulation of SWTPc 6800 and 6809 systems. A Simulated Machine Environment (SME) emulation plus .dsk file downloads.
Covers the development of a Heathkit H8 emulator on Macintosh.
An open source Sol-20 emulator for Windows.
An open source Altair emulator for Windows.
A freeware Chip-8 emulator for DOS.
An open source MIPS R3000 emulator for Unix.
A freeware ST20 emulator for DOS.
An open source Bell Labs cardiac emulator for Linux and Windows/Cygwin.
Great emulation page maintained by JoseQ, maker of the famous Rumor Mill, many downloads, great layout - some hosted sites.