NoteAway - NoteAway is the simplest, most convenient way to take quick notes on OS X.
Wondershare PDFelement - All-in-one PDF editor
JustNotepad.com - A free online notepad allows you to create any text or notes in your web browser.
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.
TakeNote - A web-based note-taking app with GitHub sync and Markdown support.
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.