MyPaint is an easy-to-use painting program which works well with Wacom graphics tablets and other similar devices.

Processing is a flexible software sketchbook and a language for learning how to code within the context of the visual arts.

Alchemy is an open drawing project aimed at exploring how we can sketch, draw, and create on computers in new ways.

Pure Data (Pd) is a visual programming language for creating interactive computer music and multimedia works.

openFrameworks is an open source toolkit designed for "creative coding". OpenFrameworks is written in C++ and built on top of OpenGL.

Processing.js is a JavaScript port of Processing, a programming language designed to write visualizations, images, and interactive content.

Verve Painter is a small GPU based painting application, that paints using brushes and 2D fluid dynamics for a real-life paint look.

DeviantArt is the world's largest online social community for artists and art.

Mischief is a sketching, drawing, and painting software for Mac OSX and Windows.

Livebrush is a simple drawing program with a lot of potential.

SketchPort is a modern environment for digital drawing with free online drawing tools.

Open Game Art is a media repository intended for use with free software game projects.

Leonardo is a painting application.