JS Paint

GrafX2 is a bitmap paint program inspired by the Amiga programs ​Deluxe Paint and Brilliance. Specialized in 256-color drawing, it includes a very large number of tools and effects that make it particularly suitable for pixel art, game graphics, and generally any detailed graphics painted with a mouse. The program is mostly developed on Haiku, Linux and Windows, but is also portable on many other platforms.

Krita is a professional FREE and open source painting program. It is made by artists that want to see affordable art tools for everyone. An intuitive user interface that stays out of your way. The dockers and panels can be moved and customized for your specific workflow. Once you have your setup, you can save it as your own workspace. You can also create your own shortcuts for commonly used tools. Over 100 professionally made brushes that come preloaded. These brushes give a good range of effects so you can see the variety of brushes that Krita has to offer. Have a shaky hand? Add a stabilizer to your brush to smoothen it out. Krita includes 3 different ways to smooth and stabilize your brush strokes. There is even a dedicated Dynamic Brush tool where you can add drag and mass. Built-in vector tools help you create comic panels. Select a word bubble template from the vector library and drag it on your canvas. Change the anchor points to create your own shapes and libraries.