
Description: Unreal Engine is a complete suite of creation tools for game developers to design and build games, simulations, and visualizations. It provides a real-time 3D engine along with visual scripting tools to accelerate development for 2D and 3D projects across multiple platforms.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Source SDK is a free software development kit created by Valve Corporation that allows users to create mods and games using the Source game engine. It includes tools for mapping, modeling, animation, scripting, particles, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API