Edopedia is described as 'Online programming language courses, just like w3schools.com. It also includes a "Try it yourself" editor so that people can try their web designing source code in a browser, without downloading anything on their computer' and is an website in the Development category. There are more than 50 alternatives to Edopedia, not only websites but also apps for a variety of platforms, including Android, iPhone, iPad and Self-Hosted solutions. The best alternative is freeCodeCamp, which is both free and Open Source. Other great sites and apps similar to Edopedia are SoloLearn (Freemium), W3Schools (Free), exercism (Free, Open Source) and tutorialspoint (Free).
HTML Reference is a free visual guide to HTML elements and attributes, implemented as a web app that makes it easy to find and narrow down tags and types of tags based on attributes like "inline", "meta" and more.
Programming quizzes with explanations and a collection of programming study materials are waiting for you at Coderslang! It's a unique opportunity to thoroughly prepare for the technical interview, learn the programming basics and test yourself.