Snip&Sketch - Quickly annotate screenshots, photos and other images with your pen, touch, or mouse and save, paste or share with other apps.
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.
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.
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.
NinjaCapture - All in on Screen Capture
Wondershare PDFelement - All-in-one PDF editor