
Description: Underscore.js is a JavaScript library that provides utility functions for common programming tasks like mapping, filtering, and functional programming paradigms. It allows developers to leverage functional techniques which can help manage state and complexity in web applications.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Bliss JS is a compact front-end JavaScript framework designed for modularity, performance and flexibility. It combines many common features of jQuery, Underscore and Backbone into a lightweight package with a simple, fluent API.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API