
Description: DMOJ is an open source automated judging system for competitive programming contests. It allows contest organizers to easily host programming competitions without needing to set up manual judging infrastructure.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Codeforces is an online platform for competitive programming contests. It features regular contests in different formats, an online judge system to practice solving programming problems, forums for discussion, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API