Free code-practice tools or service for developers
A collection of free code-practice app, tools or service for developers
![Logo thumbnail for CodeAbbey](https://www.codeabbey.com/img/icon.png)
CodeAbbey
Collection of programming problems to practice solving, learn to program and code, and win certificates
Tags: learning-resource, code-practice
![Logo thumbnail for Codeforces](https://codeforces.org/s/0/apple-icon-180x180.png)
Codeforces
Codeforces. Programming competitions and contests, programming community
Tags: algorithm, learning-resource, code-practice
Free Offer:
Codewars
Codewars is a platform that helps you learn, train, and improve your coding skills by solving programming tasks
Tags: learning-resource, code-practice
Free Offer:
![Logo thumbnail for Project Euler](https://projecteuler.net/images/clipart/euler_portrait.png)
Project Euler
Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve
Tags: learning-resource, code-practice, algorithm