MySQL - The world's most popular open source database
Material Maker - Cross-platform, procedural texture generation tool.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
Substance Designer - Substance Designer is a node-based non-destructive application for material authoring.
SQLite - SQLite Home Page
Filter Forge - On the surface, Filter Forge is just a Photoshop plugin, a pack of filters that generate textures...