The SimulAVR program is a simulator for the Atmel AVR family of microcontrollers (ATtiny and ATmega). SimulAVR can be used either standalone or as a remote target for avr-gdb. There are interfaces for Python and Tcl. When used in gdbserver mode, the simulator is used as a back-end so that avr-gdb can be used as a source level debugger for AVR programs.
ODE is a high performance library for simulating rigid body dynamics. It is fully featured, stable, mature, and platform independent with an easy-to-use C/C++ API. It has advanced joint types and integrated collision detection with friction. ODE is useful for simulating vehicles, objects in virtual reality environments, and virtual creatures. It is currently used in many computer games, 3D authoring tools, and simulation tools.
pydance is a dancing game written in Python, formerly named pyDDR. The idea is simple. There's a floor mat with arrows, and the game scrolls arrows up the screen to the beat while playing a song. When the arrows reach the top of the screen (not sooner and not later), the player hits the corresponding arrow on the pad, and given that it's hit on time with the beat, points are scored. Based on how well the dance is put together, s/he is graded at the end of the song. Both keyboard and mat play are supported.
GarlicSim is a platform for writing, running, and analyzing simulations. It is general enough to handle any kind of simulation: physics, game theory, epidemic spread, electronics, etc. GarlicSim aims to eliminate the need to write any boilerplate code that isn't directly related to the phenomenon you're simulating. GarlicSim defines a new format for simulations, called a simulation package and often abbreviated as simpack. The simpack contains all the code that define the simulated system, and is simply a Python package which defines a few special functions according to the GarlicSim simpack API. Simpack code may also be written in C. All of the tools that GarlicSim provides can be used to run simulations of all kinds of different domains.
Goptical is the GNU Optical design and simulation library. It provides model classes for optical components, surfaces, and materials and enables building of optical systems by creating and placing various optical components in a 3D space and simulating light propagation through the system. Classical optical design analysis tools can be used on optical systems. It takes advantages of the C++ object model to allow the building of complex optical systems with a few class instantiations, as optical components are represented by language objects.
PicShell is a small IDE for the JALv2 language, used to program MicroChip's PIC microcontrollers. It has a built-in 14/16 bit PIC simulator. The simulator allows some user interaction, and contains some external devices like LED, LCD, UART terminals, and buttons for quick code testing. PicShell supports ASM and JAL level debugging. It provide a built-in editor with syntax highlighting, auto-completion, and a type-assist feature. It provides a mechanism to achieve unit testing.