
Description: Lemon Group Messenger is a free and open-source instant messaging app for groups. It allows users to chat in groups up to 500 people, make voice and video calls, share photos, audio, video and other files securely. It works across platforms like Windows, Mac, Linux, Android and iOS.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Tox is an open-source, peer-to-peer instant messaging and video calling application focused on privacy and security. It offers end-to-end encryption for messages and calls to protect user data without relying on central servers.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API