Vimium - The Hacker's Browser.
Wondershare PDFelement - All-in-one PDF editor
hunt-n-peck - Simple vimium/vimperator style navigation for Windows applications based on the UI Automation...
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.
Tridactyl - Replace Firefox's default control mechanism with one modelled on the one true editor, Vim.
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.