
Description: Math Doubts is an online platform that helps students get their math homework questions answered. It connects students to expert math tutors that can provide step-by-step explanations to homework questions.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Engineer4Free is a free online platform that provides engineering tools and resources for students and professionals. It offers tutorials, calculators, converters, forums, and other tools to help with engineering projects and learning.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API