
Description: Practice and Learn SQL is a free, interactive website for learning SQL. It provides a browser-based SQL interface and challenges for writing and running queries on practice datasets.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: GalaXQL is an open-source graph database management system that allows storing and querying graph-structured data. It provides a SQL-like query language optimized for graph data.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API