
Description: Marco Polo is a video messaging app that allows users to send short video messages back and forth, much like an asynchronous video chat. It promotes authentic communication without the pressure of live video calls.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Walkie-Talkie.io is a free web-based application that allows real-time voice communication between internet-connected devices. It works like a traditional walkie-talkie, allowing users to press a button to talk and release to listen.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API