s&box is a modern game engine, built on Valve's Source 2
JavaScript-based game engine designed to empower developers
Descent 3 by Outrage Entertainment
Easily generate cue sheets for CD images with compressed audio tracks.
Open and edit the archive files used in over 5700 games.
The ultimate cataloguer
Zoomable user interface (ZUI) with file manager, file viewers and more
JavaScript framework to build game engines, games, emulators and apps
Convert PSID and RSID files into C64 executables
A c++ public domain audio output class
A Tile-based Game Engine written in C# mimicing retro consoles.
Amazon Lumberyard is a free AAA game engine
Character animation system for games and simulations.
Low-latency, high quality voice chat for gamers
3D video music media player lyrics subtitles etc...
3D .NET engine for Windows, Linux, Mac
Your electronic guitar songbook
A pygame music lib.
A generic 2D engine for any kind of game