
Description: Axolotl is an open source encrypted instant messaging client for Android that offers end-to-end encryption. It allows secure communication by using the Off-the-Record Messaging protocol.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Delta Chat is a free and open source email app that allows users to send and receive end-to-end encrypted emails. It uses email standards like SMTP and IMAP to communicate between users on different servers and systems.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API