Open-source

• irrKlang – https://www.ambiera.com/irrklang/
• OpenAL – https://www.openal.org/
• JUCE – https://juce.com/
• PortAudio – http://www.portaudio.com/
• RtAudio – https://www.music.mcgill.ca/~gary/rtaudio/
• SoLoud – http://sol.gfxile.net/soloud/
• YSE – http://www.attr-x.net/yse/

Commercial

• BASS – https://www.un4seen.com/
• FMOD – https://www.fmod.com/
• Superpowered Audio SDK – https://superpowered.com/
• The Miles Sound System – http://www.radgametools.com/miles.htm