
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: PKI.js is an open-source JavaScript library for public key infrastructure (PKI) encryption, decryption, signing and verification. It provides simple APIs for cryptography standards like RSA, ECC, X.509, PKCS and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API