Pattern Monster - Pattern Monster is a pattern maker app to create vector patterns for your projects
Material Maker - Cross-platform, procedural texture generation tool.
Patterninja - Create patterns online
Substance Designer - Substance Designer is a node-based non-destructive application for material authoring.
SVG Stripe Generator - SVG Stripe Generator is an easy-to-use tool that enables you to create unlimited stripes and then download them to the device.
Filter Forge - On the surface, Filter Forge is just a Photoshop plugin, a pack of filters that generate textures...