Vocabulary

http://dictionary.cambridge.org/ - Cambridge Online Dictionary: clear definitions and useful examples

http://thesaurus.reference.com/ - Online thesaurus

http://www.breakingnewsenglish.com/ - Adapted news stories with vocabulary and grammar activities - new each week!

http://www.letterexpert.co.uk/ - Loads of sample letters for different situations - students can borrow whole phrases, layout etc.