Open Source Raster Graphics Software

Tux Paint is a free, award-winning drawing program originally created for children ages 3 to 12, but enjoyed by all! It combines an easy-to-use interface, fun sound effects, and an encouraging cartoon mascot who guides children as they use the program. You're presented with a blank canvas and a variety of drawing tools to help them be creative. Along with paintbrush, shapes and text, Tux Paint includes a "stamp" feature to add pre-drawn or photographic imagery to pictures, and a set of "magic tools" that provide filter effects (like blur, tint and waves) and interesting drawing tools (like train tracks, bubbles and grass). Tux Paint includes a collection of "starter" images, both coloring-book style and photo-realistic, and a large collections of stamps are available as a separate download. Additional content can be added by parents & teachers, or downloaded from 3rd parties. Tux Paint is available for Windows, macOS, Android, Linux, & Haiku operating systems, among others.

Whyteboard is a painting whiteboard application for Linux and Windows, that allows the annotation of PDF and PostScript documents, and image files with common drawing tools.

Photonix is a 3D Modeling and Rendering Tool that have intentions to reach 3D Max to produce Realistic Images using Photon Mapping

Rassam-paint is an open source bitmap editing and drawing with the following advanced features :Free Selection Tool,Zoom ,Undo,Text Tool,Color palettes,Dynamic resize image,Pencil ,Lines, Rectangles , Color Picker, Round Brush , Flood Fill , Rectangle,Filters,And more... Rassam-paint support popular graphics image formats (PNG, JPEG, TIFF, BMP and others).