
Description: Butterfly Server .NET is an open-source .NET server software designed for building real-time web applications. It provides APIs and components for enabling features like bidirectional communication, push notifications, and messaging in web apps.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Socket.io is a JavaScript library that enables real-time, bidirectional and event-based communication between web clients and servers. It works by creating a persistent connection between the client and server that both can use to start sending data at any time, allowing for faster and more dynamic real-time web applications.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API