CodeSubmit is described as 'Take-Home Coding Assignments That Provide Real Insights. Identify great candidates using real tasks, not brainteasers. Streamline your tech recruiting workflow and make better hiring decisions'. There are more than 50 alternatives to CodeSubmit for a variety of platforms, including Online / Web-based, Windows, SaaS, Mac and Self-Hosted solutions. The best alternative is exercism, which is both free and Open Source. Other great apps like CodeSubmit are HackerRank (Free Personal), Codewars (Freemium), Edabit (Paid) and Project Euler (Free).
CodeChef is a not-for-profit educational initiative by Directi, an Indian software company. It is a global programming community that fosters learning and friendly competition, built on top of the world’s largest competitive programming platform.
DevSkiller is a developer screening and online interview platform powered by RealLifeTesting™ methodology. The tool allows you to find developers with the right skill set, shortening your Time-to-Hire by 60%.