
Description: Stack Browser is a web browser designed for browsing stack overflow and other stack exchange sites. It has built-in features like tagging, voting, and syntax highlighting to improve the stack overflow experience.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Caliopen is an open source and privacy-focused email and communications client. It allows users to send encrypted emails and messages without relying on large tech companies to handle their private data.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API