HGE: Haaf's Game Engine
- http://hge.relishgames.com/
- A C/C++ library for creating hardware accelerated 2D games for Microsoft Windows. It provides minimal yet fully functional and flexible set of routines for handling graphics, sound and input. [Shareware]
MIDAS Digital Audio System
- http://www.s2.org/midas/
- MIDAS is a multichannel digital sound system. It supports DOS, Win32, and Linux platforms and plays Protracker (.mod), Scream Tracker 3 (.s3m), FastTracker 2 (.xm) and Impulse Tracker (.it) modules, as well as samples and audio streams in raw or WAVE . MIDAS is free for non-commercial usage.
The Yake Engine
- http://www.yake.org/
- A small, flexible, cross-platform game engine / application framework multi licensed under the LGPL and custom licenses.
Titan
- http://titan.sourceforge.net/
- A C++ based library to load/save game-related file formats, such as graphics, sound and 3d meshes.