
Description: Linkage Mechanism Designer and Simulator is software for modeling, visualizing, and simulating mechanical linkages. It allows users to easily design linkages by adding links, joints, motors, etc. and see how they move in real time. Useful for engineers, designers, and students.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: LibreCAD is a free, open source 2D CAD application for Windows, Mac and Linux. It has a user-friendly interface and tools for drafting and design, including snap tools, layers, blocks, and dimensions. LibreCAD is lightweight yet full-featured for drawing floorplans, schematics, diagrams.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API