- Desktop Cyber
- A CDC (Control Data Corporation) Cyber 6x00, 7x or 17x type mainframe emulator for Windows or Unix.
- Great emulation page maintained by JoseQ, maker of the famous Rumor Mill, many downloads, great layout - some hosted sites.
- Open source HP-42S emulator for Android, Linux/i386, Mac OS, PalmOS, Pocket PC, Windows, and Zaurus X/Qt.
- An open source full-system computer architecture emulation framework for Unix-like systems. Screenshots, download, and documentation.
- 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.
- A Java-based simulator which implements the Mic-1 microarchitecture described in Chapter 4 of Andrew S. Tanenbaum, Structured Computer Organization, Fourth Edition. [Open source, GPL]