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Develop your coding skills and practice them by competing with hundreds of players worldwide. Code your own bots in your preferred language and join the various…

Devskiller is a developer screening and online interview platform powered by RealLifeTesting™ methodology.

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

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CodeEval is platform for hosting coding challenges which has over 20,000+ competitive developers.

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A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots…Created by hackerrank

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Sphere Online Judge created for the coders community to train, to learn and to make progress. With thousands of programming problems and an international group of…

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CheckiO is expanding the worlds code literacy through gameplay. We always wanted to create the most entertaining game where gaming and coding experiences are…

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

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Alternatives to for Web, Windows, Mac, Self-Hosted, Linux and more. Filter by license to discover only free or Open Source alternatives. This list contains a total of 25+ apps similar to m. was added byinOct 2013and the latest update was made inNov 2014. The list of alternatives was updatedJun 2018There is a history of all activites on in ourActivity Log. Its possible toupdate the informationon orreport itas discontinued, duplicated or spam.

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