NoteAway - NoteAway is the simplest, most convenient way to take quick notes on OS X.

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.

Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.

Speechy - Speechy is an app by Twelve Stars Software that comes up with features to help you in reading text in a variety of different formats such as pdf, txt, EPUB, webpages, and many others.

Wondershare PDFelement - All-in-one PDF editor