
Description: 500px is a photo sharing website and community built by photographers, for photographers. It allows users to upload, search, license and sell high-resolution photos. Known for its strict rating system and premium artistic photography.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Ungraded is a free, open-source assessment platform designed for teachers. It allows educators to create and deliver tests, quizzes, assignments, and surveys seamlessly to their students.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API