Achieve code mastery through challenge.
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- - Codewars is the most popular Web-based alternative to Kattis.
- - Codewars is the most popular free alternative to Kattis.
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.Suggest and vote on features
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. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be...Project Euler has no features, suggest some!
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- - CheckIO is the most popular Open Source alternative to Kattis.
Screeps is a massive multiplayer online real-time strategy game. Each player can create his or her own colony in a single persistent world shared by all the players. Such a colony can mine resources, build units, conquer territory.
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- - Screeps is the most popular Windows, Mac & Linux alternative to Kattis.
- - Screeps is the most popular commercial alternative to Kattis.
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.Coderbyte has no features, suggest some!
CodeSignal is the leading provider of assessments for technical hires. As the creator of the Predictive Coding Score, a measure of a candidates coding skills, CodeSignal provides HR teams with Certified Assessments, Custom Tests, and Live Interviews.
VIM Adventures is an online game based on VIM's keyboard shortcuts (commands, motions and operators). It's the "Zelda meets text editing" game. It's a puzzle game for practicing and memorizing VIM commands (good old VI is also covered, of course).Suggest and vote on features
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Codility is an evidence-based platform helps hiring teams predict the real-life skills of their candidates, remotely and at scale. This brings faster hiring, time savings, and gives engineers more time to solve problems that matter.
- - Codility.com is the most popular SaaS alternative to Kattis.
Topcoder provides members opportunities to demonstrate their expertise, improve their skills, and win cash, while helping real world organizations solve real world problems.Topcoder has no features, suggest some!
Remote Interview is an online tool for tech recruiters to hire best programmers and coders by analyzing their coding skills.Suggest and vote on features