Learn Languages Online

Chinese


ChinesePod - a convenient way to learn Chinese that combines audio lesson podcasts, web & mobile study tools and integrated speaking practice with live teachers


English


French


German


Italian


Japanese


JapanesePod101 - this web portal is hands down the best place to learn Japanese online, it's very likely the most successful site of the "101 series", the others are lagging behind in content (to be fair to the others, I'm pretty sure JapanesePod101 was the first of the series)


Korean

Talk to me in Korean - a language site dedicated to deliver fun Korean lessons for free, though for some exclusive content there's a store, by Hyunwoo Sun and others, highly recommended
KoreanClass101 - an online language learning portal, with monthly subscriptions ranging from $4 to $26, I won a lifetime premium account ($10 per month) in a competition in April 2010, very happy with the site, their forum could probably be better

Portuguese

Russian

Russland Journal - an extensive and free web portal about Russia where you can find detailed information about the Russian language and Russian culture, there's a shop built into the site where you can find anything related to Russia

Spanish


Notes in Spanish - the best resource on the web for learning Spanish, levels range from beginner to advanced, very interesting podcasts and useful worksheets by Ben and Marina from Madrid