Wondershare PDFelement - All-in-one PDF editor
FMOD - FMOD Studio is an audio middleware solution and engine for games.
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.
OpenAL - OpenAL is a cross-platform 3D audio API appropriate for use with gaming applications and many other...
Foxit PhantomPDF - Edit PDF files with our feature-rich PDF Editor. Download Foxit PDF Editor to convert, sign, scan / OCR & more. A speedy PDF Editor alternative to Adobe Acrobat.
PortAudio - PortAudio is a cross platform, open-source, audio I/O library.