
Description: Rainbow Stream is an open-source Twitter client that allows you to view, compose, and interact with your Twitter feed from the command line interface. It provides a text-based interface for tweeting, searching, viewing trends, direct messages, lists, followers, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Birdie is a free and open-source email client focused on being lightweight and easy to use. It has basic email features like POP/IMAP support, contacts management, email composing and basic customization options.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API