ArtRage 2
Painting program, free and paid versions, with great looking brushes and tools. Paint blends with other colors and has texture like actual paint.
Picnik - edit photos the easy way, online in your browser
Online application for editing photos and other images. Basic tools available with a free account.
PosteRazor - Make your own poster!
Open source project for printing images on multiple sheets of paper, making your own posters.
Vectr - Free Online Vector Graphics Editor
Free tool for creating vector graphics with a desktop and cloud version
VISIWIG | Visuals for busy designers
Online tool for creating quick patterns, textures, and icons. The images created with Visiwig are free for personal and commercial use.