General interest
BBC English http://www.bbc.co.uk/worldservice/learningenglish/
One stop English http://www.onestopenglish.com/
ESL About http://www.esl.about.com/
British Council-LearnEnglish http://www.britishcouncil.org/learnenglish.htm
Click n Learn http://clicknlearn.net/
Speaking
Conversation Questions http://iteslj.org/questions/
Tests and Quizzes (Grammar and vocabulary)
English test and quizzes http://www.englishlearner.com/
Listening
BBC English http://www.bbc.co.uk/woldservice/learningenglish/multimedia/index.shtml
The Watch and Listen section contains music, audio and interactivity to help you learn English.
Phonetics: Listen carefully to the different English phonetic symbols.
Reading
National Geographic-magazines
http://www.nationalgeographic.com/magazines/magazines.html
Dictionaries
Word reference http://www.wordreference.com/es/
Cambridge dictionaries http://dictionary.cambridge.org/es/
English for computing
The Infotech website http://www.cambridge.org/gb/cambridgeenglish/catalog/business-professional-and-vocational/infotech-4th-edition
Selectividad Tests
University -sample exams http://wzar.unizar.es/servicios/acceso/accespau/exame/exame.html