The CRAAP Test helps you evaluate information to determine if it suits your needs depending factors of currency, relevance, authority, accuracy and the purpose of the information.
Librarians and instructors have identified the following as good Internet sources for computer technologies.
OpenRefine (ex-Google Refine) is a powerful tool for working with messy data, cleaning it, transforming it from one format into another, extending it with web services, and linking it to databases like Freebase.
Contains in-depth tutorials and quizzes for HTML, CSS and XML. Covers browser and server scripting for JavaScript, AJAX, SQL and other languages. Also contains code validators for HTML, CSS, XHTML and XML.