EMF is a description language of computer hardware, plus the tools necessary to convert it into code. By describing a processor, for example, in a structured fashion means that the EMF software can automatically generate an emulator for that processor in any given programming language

Project Apollo for Orbiter is an add-on for Orbiter which recreates the Apollo missions.

The free space simulation that lets you explore our universe in three dimensions

KSP is a game where the player creates and manages his own space program.

Build spacecraft, fly them, and try to help the Kerbals to fulfill their ultimate mission of conquering space.

KSP is a game where the player creates and manages his own space program. Build spacecraft, fly them, and try to help the Kerbals to fulfill their ultimate mission of conquering space.

Nanopond is a "corewar style" evolvable instruction set based virtual machine written in C. It is similar in design to Tierra and Avida but considerably smaller and simpler. Version 1.0 weighs in at only 840 lines of C code, the majority of which are comments! It is very highly optimized and supports simple color visualization using the SDL (Simple Directmedia Layer) library.

This program allows you to simulate simple circuits of logic gates on the screen. The gates and the "wires" connecting them are chosen from the toolbox of icons at the top of the page and then by clicking on the appropriate square on the grid itself.

"libcpu" is an open source library that emulates several CPU architectures, allowing itself to be used as the CPU core for different kinds of emulator projects. It uses its own frontends for the different CPU types, and uses LLVM for the backend. libcpu is supposed to be able to do user mode and system emulation, and dynamic as well as static recompilation.

VertiSim is a 3-D simulation of the immortal Mattel toy from the 1970s, the Vertibird.

This java applet is an electronic circuit simulator. When the applet starts up you will see an animated schematic of a simple LRC circuit. The green color indicates positive voltage. The gray color indicates ground. A red color indicates negative voltage. The moving yellow dots indicate current.

open source space simulation game

The Microsoft® Robotics Developer Studio 2008 R3 (Microsoft RDS) is a Windows®-based environment for academic, hobbyist, and commercial developers to easily create robotics applications across a wide variety of hardware. All previous editions of Microsoft RDS 2008 R2 (Express, Standard and Academic) have been combined into one new version, RDS 2008 R3 and can be downloaded at no charge.

VirtualBreadboard is an easy to use simulation and modelling tool that can be used in place of a real breadboard for quickly performing experiments and testing out electronic and microcontroller powered 'embedded' applications. Since 1999 VirtualBreadboard has been a favourite with universities and enthusiasts from all around the world.

Luz is a complete open-source CPU suite, featuring an assembler, linker and simulator

Logisim is an educational tool for designing and simulating digital logic circuits.

Golly is an open source, cross-platform application for exploring Conway's Game of Life and other cellular automata. The primary authors are Andrew Trevorrow and Tomas Rokicki, with code contributions by Tim Hutton, Dave Greene and Jason Summers.

These pages describe how we went about building a Wireworld computer. Although at least one design exists for a tape-based Turing machine implemented in the ‘Game of Life’, ours is, as far as we know, the first ever computer implemented as a cellular automaton that you might reasonably want to write a program for. The design was done by David Moore and Mark Owen, with the help of many others, between 1990 and 1992. It’s a testament to our modesty that it was not until September 2004 that we wrote up our work.

Logicly simulates digital circuitry with a simple drag-and-drop interface. Built with Adobe Flex, Logicly features a set of "wiring" components created by Josh Tynjala that are based on the Yahoo! Pipes UI.

This is the source code for Micropolis (based on SimCity), released under the GPL. Micropolis is based on the original SimCity from Electronic Arts / Maxis, and designed and written by Will Wright.

Welcome to the official wiki for MESS (Multi Emulator Super System), the sister project of MAME1). MESS is an open source project which documents the hardware for a wide variety of (mostly vintage) computers, video game consoles, and calculators through software emulation, as MAME does for arcade games. As a nice side effect to this documentation, MESS allows software and games for these hardware platforms to be run on modern PCs.

Welcome to the .NET Terrarium 2.0 project! Terrarium was created by members of the .NET Framework team in the .NET Framework 1.0 timeframe and was used initially as an internal test application. At conferences and via online chats, Terrarium provided a great way for developers to learn about the new .NET programming model and languages as they developed creatures and introduced them into a peer-to-peer ecosystem.

Detours is a library for instrumenting arbitrary Win32 functions on x86, x64, and IA64 machines. Detours intercepts Win32 functions by re-writing the in-memory code for target functions. The Detours package also contains utilities to attach arbitrary DLLs and data segments (called payloads) to any Win32 binary.

Epiar is an open source, open-ended space action/trading game.

OpenTTD is an Open Source clone of Transport Tycoon Deluxe

The purpose of this project is to provide a computer simulation of the onboard guidance computers used in the Apollo Program's lunar missions, and to generally allow you to learn about these guidance computers. Since this can be quite intimidating, we invite you to look at our "kinder and gentler" introductory page before immersing yourself in the full, gory detail presented by the bulk of the website.

Logic Gate Simulator is an open-source tool for experimenting with and learning about logic gates. The simulator tool was originally designed for CIS students at South Puget Sound Community College but is free for anyone to use and modify under the GPL v3.

Logic Gate Simulator is written in C#/WPF using .NET 3.5 SP1

Simutrans is a freeware and open-source transportation simulation game.

Your goal is to establish a successful transport company. Transport passengers, mail and goods by rail, road, ship and air. Interconnect cities, districts, public buildings, industries and tourist attractions by buiding a transport network you always dreamed of.

Space MMO

ORBITER is a free flight simulator that goes beyond the confines of Earth's atmosphere. Launch the Space Shuttle from Kennedy Space Center to deploy a satellite, rendezvous with the International Space Station or take the futuristic Delta-glider for a tour through the solar system - the choice is yours.

HTML 5's canvas tag implemented using Silverlight!

Free & open source game of
rail & business simulation

Glenn Fiedler, an Australian Game Developer in Los Angeles

Meet the X-Plane family of flight simulation software, all based on Laminar Research’s remarkable Blade Element Theory.