Unity - The multiplatform game creation tools for everyone.
Wwise - Game audio engine, designed to give artists more control and save programmers' time.
SoLoud - Easy to use, free, portable c/c++ audio engine for games.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
OpenAL Soft - OpenAL Soft is an LGPL-licensed, cross-platform, software implementation of the OpenAL 3D audio API.
PortAudio - PortAudio is a cross platform, open-source, audio I/O library.