FlightGear Flight Simulator: free open-source multiplatform flight sim
IEC 104 Source code Library for Windows, Linux, QNX, Real time OS, ARM
IEC 101 Embedded Linux ARM, POSIX x86 x86-64 - c, c++ programming
IEC 104 Source code Library for Linux c c++ posix arm
PPface is vector processor emulator / simulator
RetroPC-SIM is an Arduino project to help to understand how pc works
Open source model airplane simulator
Supports NxT, Asuro, Arduino-Bot and many more. With simulator.
To be a practical Arduino simulator