VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Wondershare PDFelement - All-in-one PDF editor
AIMP - AIMP : Free Audio Player : Официальный сайт программы
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.
foobar2000 - An advanced freeware audio player for the Windows platform.
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.