
Description: Mongrel is a fast HTTP 1.1 web server library written in Ruby for the Ruby on Rails and Sinatra web frameworks. It is light, easy to install and configure, and good for development and testing environments.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Tntnet is an open-source web application server written in C++. It is lightweight, fast, and provides an alternative to other servers like Apache or Nginx for serving web applications. Tntnet focuses on high performance and small resource usage.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API