RetroArch is a frontend for emulators, game engines and media players.
An Open Source DOS emulator to run old DOS games
A free transportation simulator game
For exploring cellular automata like Conway's Game of Life.
An advanced MIDI utility for roblox.
A planetarium software that shows a 3D simulation of the night sky
4X Space Strategy Game
C64/Amiga emulator with shader and runAhead
3D Engine c++
Colonize the New World.
Multiplatform MIDI File Player for Linux, Windows, and macOS
WW2 U-boat simulation
A very richly featured implementation of the Sokoban puzzle game
GemRB is a portable open-source implementation of the Infinity Engine