Blargg's video game music file emulation/playback library
LGPL-2.1 License
DS emulator, sorta
Simple-to-use C/C++ library to play PC-98 PMD chiptunes
Cross platform C++11 library for decoding audio (mp3, wav, ogg, opus, flac, etc)
a multi-system chiptune tracker compatible with DefleMask modules
Wyrm is a 2D MOG (Multiplayer Online Game) based on SFML.
a cross-platform, terminal-based music player, audio engine, metadata indexer, and server in c++
amp11lib, used by Serious Sam to decode mp3s, backup from https//marvin.cc.fer.hr/~elf/amp11lib/
SDL Graphics Extension library