Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Wondershare PDFelement - All-in-one PDF editor
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.
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.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
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.