The Odin Project

The most opinionated and effective free web development curriculum on the internet. The Odin Project teaches full-stack web development (HTML, CSS, JavaScript, Ruby on Rails or Node.js, React) through project-based learning — you build real applications, not toy examples. The community is legendary: the Discord server has 300,000+ members, and graduates routinely credit TOP with their career transitions. Unlike tutorial sites that hold your hand, TOP forces you to research, debug, and problem-solve independently — which is exactly what employers want. Founded by Erik Trautman in 2013. No accounts, no fees, open-source.