Material Maker - Cross-platform, procedural texture generation tool.
Filter Forge - On the surface, Filter Forge is just a Photoshop plugin, a pack of filters that generate textures...
NeoTextureEdit - NeoTextureEdit is an open source (GNU LGPL v.
PatternedAI - Generate Seamless Patterns with AI
TextureLab - Free, Cross-Platform, GPU-Accelerated Procedural Texture Generator.
PixPlant - A complete solution for repeating textures and 3D maps. Save a lot of texturing time with PixPlant!