FMOD - FMOD Studio is an audio middleware solution and engine for games.
Coherent GT - Fast user interface runtime for PC and Consoles
OpenAL - OpenAL is a cross-platform 3D audio API appropriate for use with gaming applications and many other...
Sciter - Embeddable HTML/CSS/script engine
PortAudio - PortAudio is a cross platform, open-source, audio I/O library.
Ultralight - Fast, light HTML UI solution for C++ apps