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.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
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.
Adobe Illustrator CC - Adobe Illustrator CC is a commercial vector graphics editor.
Wondershare PDFelement - All-in-one PDF editor
Boxy SVG - Boxy SVG is a vector graphic editor built for the modern web.