
Description: Chttr.co is a free, open-source alternative to Slack that allows teams and organizations to chat and collaborate. It offers public/private channels, direct messaging, file sharing, search, and integrations with other services.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Bluesky is an open source social media platform focused on ethical algorithms, privacy, and decentralization. It aims to provide an alternative to the big commercial platforms by creating a federated network of servers to host users' data.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API