There is no doubt that the best way to learn English is to practice it as long as possible. Gone are the times when attending class and consulting a book were the only means to which you could access. Internet has made everything easier. Learning English online has become an extremely effective and cheap alternative.
Here I leave some web pages to learn English:
http://www.papora.com/es/aprender-ingles-online
http://www.lyricstraining.com/
http://www.breakingnewsenglish.com/
http://www.vocabsushi.com/
http://www.bbc.co.uk/learningenglish
http://www.mansioningles.com/
RE: Useful apps/websites to learning English