
Description: Lunacy is a free graphic design software for Windows that allows users to open, edit, and export Sketch files. It provides a similar workflow and set of tools as Sketch for designing user interfaces and prototypes but without the subscription cost.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Penpot is an open source design and prototyping tool for UI and UX designers. It allows designers to create wireframes, mockups, and prototypes with support for canvas grids, symbols, shared libraries, and sketch imports. Penpot has vector editing capabilities, component libraries, and developer handoff features.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API