CSSBattle

Codewars is where developers achieve code mastery through challenge. Train on kata in the dojo and reach your highest potential.

CodinGame is a challenge-based training platform for programmers where you can improve your coding skills with fun exercises (25+ languages supported).

As a free css gradient generator tool, this website lets you create a colorful gradient background for your website, blog, or social media profile.

DevChallenges.io is a community and a platform for anyone who wants to become a Software Engineer by building real-life projects and solving practical tasks. devChallenges.io is built with the goal of enabling you to build an outstanding portfolio.

Learn, Write, Master: HTML/CSS Through Real UI Challenges.

Learn to code with fun, bite-sized challenges. Gain XP, unlock achievements and level up. It's like Duolingo for learning to code.