Simple to use paint program like Paintbrush for Mac or classic MS Paint, but for Linux.
Milton is a free and open-source infinite canvas paint program. Features: Draw with infinite detail on an infinite canvas. It feels raster-based but it works with vectors Your work is saved every time you make a change. There is no need for a save button Milton files are very small. Unlimited undo and redo which persists after you close the app. Layers Blur Lines Export your work to bitmaps of any size. Export to JPEG or PNG at any resolution your machine supports It supports Windows 7 and up.
Pinta is a graphics drawing/editing program modeled after Paint.NET. It strives to be simple yet feature-rich, and runs cross-platform. Drawing tools include freehand, lines, rectangles, ellipses, and more. It allows unlimited layering, undo and redo history, over 35 image effects, and supports floating or MDI workspace layout.