
Description: Postcrossing is an online project that allows its members to send and receive postcards from random people all over the world. It connects people across borders and cultures through physical mail.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: BookCrossing Core is an open source web application for tracking books across readers through a unique book ID or ISBN number. It allows readers to release books into the wild for others to find and register, supporting a book sharing community.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API