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.
Snip&Sketch - Quickly annotate screenshots, photos and other images with your pen, touch, or mouse and save, paste or share with other apps.
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.
Apowersoft Free Screen Capture - Apowersoft Free Screen Capture is the free online screen recorder that allows users to do unlimited recordings within a few clicks.
Wondershare PDFelement - All-in-one PDF editor
NinjaCapture - All in on Screen Capture