
Description: WorldCat is an online library catalog that allows you to search the collections of libraries around the world. It provides access to over 2 billion items including books, e-books, DVDs, and more from thousands of libraries worldwide.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Letgo is a popular app that allows users to buy and sell used goods locally. It connects local buyers and sellers, making it easy to list items for sale and browse things people near you are selling.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API