
Description: RegExr is a tool for creating, testing and debugging regular expressions. It allows you to easily test regex patterns against text inputs in a visual interface, and offers features like syntax highlighting, explanations, cheat sheets and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: .NET Regular Expression Designer is a free open source tool by Microsoft that allows developers to visually create, test, and debug .NET regular expressions. It has features like syntax highlighting, testing against sample text, and explanation of regex components.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API