
Description: picoCAD is a free and open source 2D CAD program for Windows, Linux and macOS. It has basic drafting tools for creating and editing drawings and schematics and can export to several file formats.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Tattoo is a free, open-source diagramming and wireframing software for designers. It allows quick creation of sitemaps, UI flows, journey maps, wireframes and prototypes. Key features include a minimal and intuitive interface, drag and drop editor, auto save and version control.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API