Offers several free image manipulation programs. Some of the tools create seamless Perlin textures. (Windows)

Specialized in 3D maps design. Features compositing graph to build up and mix textures including procedural and tiling options in order to create maps. Offers also a library of presets plus documentation, gallery and forums.

Picture generator based on mathematical expressions (TCL) for red, blue, green color components using coordinates, radius or angle variables. (Windows and Linux-ix86)

Node-based seamless texture editor that comes with over 500 finished texture presets.

A tool generating seamless textures from photographic images. Examples and trial version provided. (Windows)

A ZBrush plug-in which features automatic UV unwrapping optimized for 3D sculpting purposes. Galleries and forums available.

Programs for texture creation and generation, as well as screensavers: Image Styles, Seamless Factory, Script Magic, Work Performer, Digital Waves and Texture Processor. (Windows only)

Generate seamless textures, 3D modeling textures or desktop wallpapers. Includes image manipulation tools, filters and masks for transparency effects.

Program has tools, which traditionally are used for drawing and editing images. The feature of the program is innovative functions for creation images including 3D images.

Fast texture synthesis by nonparametric Markov Random Field (MRF) modeling, source code is provided, plus many free textures. (Windows)