
Description: Submarine is an open-source alternative to Trello for kanban project management. It allows users to create boards, lists, and cards to organize tasks and projects in a visual way.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: gSubs is an open-source subtitle editor for Linux. It allows users to easily edit, translate, adjust timing, and style subtitles for videos. gSubs has a simple interface and supports many popular subtitle formats.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API