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The winlin project is the open source linux emulator running in the user mode. It emulates linux system calls on a source code layer. It can be used to port linux programs under Windows.
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cingb is an ATTEMPT to write a Gameboy-emulator for all kinds of platforms.
It plays Gameboy and Gameboy Color ROMs, includes a debugger for step-by-step analysis of Gameboy programs and might be also interesting for educational
purposes.
SPU2ghz is a SPU2 plugin for the PlayStation 2 emulator PCSX2 (and other that use the same plugin API). cdvdGigaherz is a CD/DVD plugin using win32 IoCtl calls to access real drives.
truereality is a open source n64 emulator. the aim of this project is NOT to run commercial games, instead it should be a piece of c source code which teaches you how to do software emulation in a portable way.
N-sim is a framework for studying and developing wireless sensor networks. It emulates the computation of sensor platforms, simulates the wireless communications, and allows plug-in models for source detection simulation. Intended for cluster computing.
Wireless Land (WL) implements a wifi layer for the User Mode Linux architecture. It comes with a Wireless Land server which provides the virtual wireless cards and a GUI for the network visualisation.
A retargettable micro-controller and embedded system emulator architecture, providing common supports to emulate various types of micro-processors & devices on an x86 PC. Development of emulation for Arduino and various shields is just about to be launched in 2012.
OpenMMOd is a open-source event-driven MMORPG Server written in C++ with a YAML packet definition backend. It is MySQL database driven currently with future backend support to come in the future.
Dapple/NDapple are Apple ][ emulators, aiming to support a well-fitted Apple ][, ][+ or //e machine with 64K. It is (was) based on Marat Fayzullin's M6502 with 65C02 additions. Dapple ][ aims for a 128K //e.
C library which allows to easily setup a VT52/VT100/ANSI/ECMA048/AVATAR telnet server. Can handle multiple clients with a simple API, main features: minimal bandwidth consumption, optimized network architecture, console color support.
PocketInsanity is a project to provide ports of existing Open Source projects to the PocketPC ARM Platform. Examples are FreeSCI (Sierra Games VM), UAE (Amiga Emulator), Wolfenstein 3D and XRick. More are following as the project advances.
This site is for the volunteers -- the MMIXmasters -- who are converting all of the programs in Knuth's "The Art of Computer Programming" Volumes 1 - 3 from MIX to a new language, MMIX.