Oxford Dictionnary
Word Reference, online dictionnary and translator
Conversation Exchange, online tandems
Thesaurus, online synonym dictionnary
Polyglot Club, online tandems
Cambridge Dictionnary, dictionnary and translator
Grammar Index, ressources
British Council, tout ce dont vous avez besoin
Anglais Facile, cours en ligne
Open Edu, online redaction classes for various texts
Letter Writing Guide, for all your letter needs
Career Services, University of Pennsylvania
The Writing Center, to improve your academic writing
6 minute podcasts in British English
Podcasts in American English
LibriVox, free audiobooks
BBC pronunciation exercises
Playphrase, phrases from movies
American News
Nature.com, for all things nature
The Guardian, British News
British Broadcast Company News
GreenFacts, ecology and health
New York Times, American news
Rolling Stones Mag, for all things culture
NASA, all about space