Description: freeCodeCamp is a free, open source coding platform that offers interactive coding challenges and projects to help people learn web development. It has a large community of developers and allows users to earn certifications.
Type: software
Pricing: Open Source
Description: Project Euler is a website dedicated to a series of computational problems intended to be solved with computer programs. The problems involve mathematics and logic puzzles that require knowledge of math and programming to solve.
Type: software