
Description: The Grinder is an open source load testing framework for simulating users and generating load to test the performance and scalability of web applications. It allows scripting test cases with Jython and viewing graphical statistics in real-time.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Tsung is an open-source multi-protocol distributed load testing tool. It is designed to test the performance of web servers, application servers, and other types of network-based software by simulating a heavy load on the target system.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API