
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: Hiawatha is an open source web server that focuses on security and speed. It is designed to be easy to use, secure out of the box, and lightweight.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API