
Description: YakYak is an open-source desktop chat client for Google Hangouts. It is available on Linux, Windows, and macOS. YakYak allows users to chat with their Google contacts without using the web browser.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: LekkerIM is an open-source, ad-free instant messaging client for Windows, Linux and macOS. It focuses on security, privacy and customization with features like encrypted chats, multiple accounts, themes and plugins.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API