
Description: Tatlin is a free, open-source web design and prototyping tool. It allows users to create mockups and prototypes for web pages and mobile apps. Key features include drag-and-drop design, reusable components, collaboration tools, and support for animations.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: STLView is a free software for viewing and manipulating STL files. It allows users to open, view, rotate, pan, zoom, and measure STL models. Useful for previewing 3D prints before slicing.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API