
Description: The PHP Fat-Free Framework is an open-source, lightweight PHP micro-framework that helps build dynamic web applications quickly. It has a simple yet powerful routing system, built-in support for Web templates, multilingual capability, and an easy-to-use SQL database abstraction layer.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Backdrop CMS is an open source content management system forked from Drupal in 2013. It is lightweight, flexible, and aimed at small to mid-sized websites and non-profits.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API