
Description: OpenLevelUp is an open source alternative to Duolingo. It provides a web-based platform for learning languages through interactive lessons, flashcards, stories, and quizzes. The focus is on vocabulary building, grammar, reading, writing, listening, and speaking skills.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: OpenStreetMap is a free, open-source, crowd-sourced map of the world. Volunteers collect map data using GPS devices, aerial imagery, local knowledge, and other free sources to create and update the map database.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API