Coding Challenges
Awesome First Pull Request Opportunities
A curated list of open-source projects that are beginner-friendly and offer 'good first issue' opportunities for new contributors.
CodeChef
A competitive programming and coding education platform featuring online compilers, practice problems, and AI-powered learning assistance.
CodeCombat
An educational platform that teaches programming languages like Python and JavaScript through a browser-based role-playing game.
Codepip
A platform featuring web development games designed to teach coding concepts like CSS, SQL, and other programming fundamentals.
CodeTriage
A platform that helps developers contribute to open source projects by sending daily open issues from selected repositories to their inbox.
Codewars
A platform for improving programming skills through community-created coding challenges called kata, supporting over 55 programming languages.
CodinGame
A platform for improving programming skills through interactive coding games, puzzles, and competitive challenges in over 25 languages.
Codinn
A collection of beginner-friendly React project tutorials with complete source code to help developers improve their skills.
Command Challenge
An interactive platform for practicing and mastering command-line interface skills through a series of terminal-based challenges.
CSS Battle
A competitive CSS coding game where developers recreate target images using the shortest possible code.
CSS Diner
An interactive game designed to teach CSS selectors through a series of 32 progressive levels.
devChallenges
A platform offering curated coding challenges and career roadmaps to help developers build portfolios and improve front-end and full-stack skills.
devQuizzes
A community-driven platform for testing technical knowledge through user-submitted quizzes across various programming languages and frameworks.
First Timers Only
A resource hub and initiative helping new developers make their first open source contributions through curated issues and guidance.
Frontend Mentor
Platform providing professional design-to-code challenges to help developers build portfolio projects and improve real-world coding skills.
Frontend Practice
A platform for frontend developers to improve their skills by recreating real-world websites with curated resources and design assets.
Hacktoberfest
An annual global event encouraging contributions to open-source software projects throughout the month of October.
Hacktoberfest Swag List
A community-curated directory of organizations offering swag to contributors during the annual Hacktoberfest open-source event.
LeetCode
Online platform for technical interview preparation, coding practice, and algorithm development with a large repository of problems.
Mastery Games
Interactive educational games designed to teach web development skills like CSS Grid and Flexbox through gamified challenges.
Project Euler
A collection of challenging mathematical and computer programming problems designed to be solved using programming skills.
Up For Grabs
A curated directory of open source projects featuring beginner-friendly tasks for new contributors to get started.
VIM Adventures
Online puzzle game designed to teach and memorize Vim keyboard shortcuts, commands, motions, and operators through gameplay.