EOI Intermediate 2
British English vs. American English
Online exercises:
http://www.isabelperez.com/dictionaries/br_am.htm
http://www.isabelperez.com/hotpot/br_am_2.htm
Lists of words:
http://www.saberingles.com.ar/lists/american.html
http://www.mansioningles.com/vocabulario63.htm
Videos:
http://www.englishonline.org.cn/en/learners/how-to/story4#tabs-100650-1
Radio and TV in English
Pronunciation
Phonetics:
http://www.oup.com/elt/global/products/englishfile/elementary/c_pronunciation/
Howjsay:
Pronunciation tips:
http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/
Online dictionaries
Wordreference (bilingual)
Oxford (monolingual)