
Description: Marko is an open-source JavaScript library for building web apps. It uses a declarative syntax to build user interfaces by composing components. Marko emphasizes performance, readability, reusability and a small API surface.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Preact is a fast, lightweight alternative to React. It has a similar API to React but with a much smaller footprint, making it well-suited for websites where performance is critical.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API