
Description: Mattermost is an open-source, self-hosted online chat service with file sharing, search and integration capabilities. It supports text, images, videos and custom emojis across PCs and phones with instant notifications.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Plumm is a free, open source project management software. It provides tools for task management, time tracking, resource planning, reporting, and more. Plumm has an intuitive and customizable interface suitable for individuals, teams, and organizations.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API