Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
4D - 4D is a relational database management system and IDE.
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
LiveCode Platform - It is Both Under the GPL and it is also Proprietary if using the GPL version the software you make...
memcached - High-performance, distributed memory object caching system
ESM Tools - ESM Tools is a powerful and widely known software development platform that comes with a centralized model infrastructure, providing the common frame for compiling, running, downloading, and organizing models (ones or multiple).