Codinn
Codinn provides a structured 10-day challenge for developers to enhance their React proficiency through hands-on project building. The platform offers step-by-step tutorials for various applications, including games like Tic-Tac-Toe and Snake, as well as functional components like custom forms, drag-and-drop interfaces, and e-commerce layouts. Each project includes full source code, making it a practical resource for building a professional portfolio.
Checked on Oct 18, 2026.
Alternative resources
Up For Grabs
A curated directory of open source projects featuring beginner-friendly tasks for new contributors to get started.
First Timers Only
A resource hub and initiative helping new developers make their first open source contributions through curated issues and guidance.
CodinGame
A platform for improving programming skills through interactive coding games, puzzles, and competitive challenges in over 25 languages.