Download and solve practice problems in over 30 different languages. For code newbies and experienced programmers.


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' and is an app. There are more than 25 alternatives to CodeSubmit for a variety of platforms, including Web-based, SaaS, Windows, Mac and Linux apps. The best CodeSubmit alternative is exercism, which is both free and Open Source. Other great apps like CodeSubmit are LeetCode, HackerRank, Project Euler and BitDegree.
Download and solve practice problems in over 30 different languages. For code newbies and experienced programmers.


LeetCode is a platform for learning and improving coding skills with the goal of being fully prepared for programming interviews. Choose problems to solve from categories such as System Design, Algorithms and Database, join code contests and engage in mock interviews.


A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots and collaborate to solve real-world challenges.


Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve.


Interactive platform for acquiring Web3 skills via Missions—micro-tasks covering crypto topics—rewarding users with tokens, NFTs, and merchandise from crypto brands. Earn Bits to boost winning odds, create Missions, join Guilds, and benefit from referrals.










CodinGame is a challenge-based training platform for programmers where you can play with the hottest programming topics.


octree.io is a platform where you can practice Leetcode-style problems in a room with other people. It serves as a supplement to Leetcode as you can invite your friends to practice problems together. It features a Game Room, Trivia Room and a Lobby which is a Slack-like chat...

When learning to code, most people get stuck on the "bridge" between memorizing syntax and understanding the logic that makes it all work. We believe the most effective way to learn a programming language is to break the process into three phases:



Learn to code JavaScript by playing game. This game claims to be the world’s first MMO strategy sandbox game for programmers.



Coderbyte is a place built for anyone to practice and perfect their programming skills. Challenges are added almost every day so you can work on applying your algorithmic thought process on any problem you want at anytime.