Drawing software for Windows/macOS/iPad/iPhone/Galaxy. Includes features for illustration, comics, and animation.
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
World Machine - Command powerful tools like erosion and advanced colormaps to create terrain heightmaps, meshes, and textures for your game or 3D scene. Download for Free!
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Vue - Create vast expanses of terrains, add trees, select the best point of view and render...
GIMP - GIMP is a multiplatform photo manipulation tool.
Picogen - The homepage of the free (as in freedom), GPL-licensed Terrain Synthesizer and Renderer named 'picogen'