
Description: CheckIO is an online platform for learning and practicing programming through solving code challenges. It provides bite-sized coding puzzles of increasing difficulty that allow users to improve their coding skills in Python and JavaScript.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: CSSBattle is a web-based game that challenges players to recreate simple image patterns using only HTML and CSS code. It features hundreds of challenges across multiple levels, from beginner to expert.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API