CSSBattle
Focus: css and coding game. Shares challenges and practice with Codewars. Free (Codewars: Freemium). Same 4.6 rating.
Web AppFreeWeb
4.6Visit
Web App
Codewars
Sharpen your coding skills with community-made coding challenges.
Built with love by Shushant Lakhyani. Building bestproductivityresources.com
What is Codewars?
Codewars offers thousands of coding challenges called kata in more than 50 languages, ranked by difficulty, so you can practise, compare solutions and climb the leaderboards. Training is free, and the optional Codewars Red subscription removes ads and adds extras such as unlocked solutions.
Pros
- Huge library of challenges
- Learn from other people's solutions
- Many languages supported
Cons
- Ads for free users
- Some kata are poorly worded
Who should use Codewars
Developers who want short, regular coding practice.
Who may not need it
Complete beginners who need a structured course first.
Codewars alternatives
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Codecademy
Focus: courses and python. Shares coding and programming with Codewars. A course, not a web app. Adds iOS and Android. Rated 4.5 (Codewars: 4.6).
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100 Exercises To Learn Rust
Focus: rust, course and exercises. Shares programming with Codewars. A course, not a web app. Free (Codewars: Freemium). Rated 4.8 (Codewars: 4.6).
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JavaScript.info
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Eloquent JavaScript
Focus: javascript, ebook and exercises. Shares programming with Codewars. A book, not a web app. Free (Codewars: Freemium). Rated 4.7 (Codewars: 4.6).
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Free alternatives to Codewars
Free resources that cover similar ground.
Devhints
Focus: cheatsheets, reference and github. Shares programming with Codewars. A website, not a web app. Free (Codewars: Freemium). Same 4.6 rating.
WebsiteFreeWeb
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Lobsters
Focus: news, community and links. Shares programming with Codewars. A community, not a web app. Free (Codewars: Freemium). Rated 4.5 (Codewars: 4.6).
CommunityFreeWeb
4.5Visit
QuickRef.ME
Focus: cheatsheets, reference and command line. Shares programming with Codewars. A website, not a web app. Free (Codewars: Freemium). Rated 4.5 (Codewars: 4.6).
WebsiteFreeWeb
4.5Visit
WonderHowTo
Focus: how-to, video index and hacks. Shares coding with Codewars. A website, not a web app. Free (Codewars: Freemium). Rated 4.2 (Codewars: 4.6).
WebsiteFreeWeb
4.2Visit
Compiler Explorer
Focus: compiler, assembly and c++. Also in Learning, like Codewars. Free (Codewars: Freemium). Rated 4.8 (Codewars: 4.6).
Web AppFreeWeb
4.8Visit
Desmos
Focus: graphing calculator, maths and education. Also in Learning, like Codewars. Free (Codewars: Freemium). Adds iOS and Android. Rated 4.8 (Codewars: 4.6).
Web AppFreeWeb, iOS
4.8Visit
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