W3Schools - W3Schools is a web developers information website, with tutorials and references on web development...
CodeAbbey - Programming problems to practice and learn for beginners
Free Code Camp - Learn to code by helping nonprofits.
Coderbyte - Coderbyte is a place built for anyone to practice and perfect their programming skills.
Tuts Insider - Tuts Insider is a source for developers to learn web desgining, development and much more. Tuts Insider also provides 100s of examples.
Codewars - Achieve code mastery through challenge.