OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
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.
Synfig Studio - Just another WordPress site
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.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Wondershare PDFelement - All-in-one PDF editor