Wondershare PDFelement - All-in-one PDF editor
Lunyr - A decentralized crowdsourced encyclopedia.
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.
Inverse - Team conversations and knowledge sharing on any webpage
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.
Diem - Diem is a knowledge-sharing platform and digital safe space built for women and non-binary people.