Offers several free image manipulation programs. Some of the tools create seamless Perlin textures. (Windows)
ColorFunction Image Generator
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.
Imagelys Picture Styles
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.
Nonparametric Texture Synthesis
Fast texture synthesis by nonparametric Markov Random Field (MRF) modeling, source code is provided, plus many free textures. (Windows)
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)
Full-featured image editor for creating seamless photo realistic textures and tiles from digital photography, or from scratch. Anything that you paint, clone, or retouch, automatically becomes seamless. (Windows)
A 3D texturing tool that creates high quality normal, displacement, specular maps and seamless textures from plain photos. Screenshots, tutorials and online manual available.
Seamless Texture Generator (STG)
Create seamless textures from existing pictures. Also includes highlights and shadows removal, crop, rotate and perspective correction.
Seamless texture generator and designer featuring more than 130 generators and 700 presets. (Windows)
Multifunctional toolbox that allows turning practically any picture into a repeatable tile very quickly and easily. Such tiles are used as backgrounds of web pages, as wallpapers, as textures for 3D objects and for many other purposes. [Windows 95/98/NT/Me/2000/XP]
Bitmap editor to transform pictures into seamless textures. Offers plenty of effects and filters. (Mac 8, 9 and Mac OS X)
Photoshop plug-in for Windows to create seamless patterns. Patterns can be saved as BMP, JPEG or PNG graphic files.
XFader - Pegtop Software
Turns BMP or JPG images into seamless textures. Includes tools for fading control, color adjustment, crowd effect, stereogran generation and filters (such blur, wave and relief).