Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
FMOD - FMOD Studio is an audio middleware solution and engine for games.
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
OpenAL - OpenAL is a cross-platform 3D audio API appropriate for use with gaming applications and many other...
Wondershare PDFelement - All-in-one PDF editor
PortAudio - PortAudio is a cross platform, open-source, audio I/O library.