Pons Great online dictionary.
Lexicity Ancient languages resources index.
Anki Program that uses flash cards to make remembering things easier.
Babadum 5 games to play, 14 languages to learn.
Forvo Pronunciation guide. All the words in the world pronunced by native speakers.
Audio-lingua Listen to over 4000 audio recordings in 11 languages.
Fsi-languages A repository of courses developed by the United States government for 45 different languages.
Reverso Multilanguage verb conjugation.
Linguee Good dictionary that also allows you to search a billion translations.
Memrise User created courses which are maintained by the community to help you build your vocabulary.
Duolingo Similar to memrise but better.
Le Conjugueur French verb conjugation.
French Linguistics General purpose site, includes a dictionary, grammar, phrases and an active forum.
Verbix Finnish verb conjugation.
The Finnish Language Introduction to Finnish.
Alphadictionary Russian grammar.
Master Russian Collection of lessons, dictionaries, tests and information about Russian culture.
1tv.ru Russian television (live streaming + archives).
Norwegian Introduction to Norwegian.
Emilie Nereng The youtube channel of Miss Norway, very educational.
The Japanese Page Community of people learning Japanese.
Genki Resource Page Contains stroke orders, hiragana and katakana drag-and-drop exercises and more.
Guide to learning Japanese Complete guide to learning Japanese.
Realkana Hiragana & katakana.
Guide to Japanese: Grammar Very comprehensive guide to Japanese grammar, also available as a pdf.
Guide to Japanese: Forum Forum from the same site, now closed but still available as an archive.
Rikaisama Japanese-English popup dictionary with lots of features (for firefox only).
Japanese Stackexchange Question & answer site for Japanese students/teachers/linguists.
Erin Video lessons with subtitles in Japanese and English.
Imabi Ridiculously detailed Japanese grammar.
Kanji Damage Uses a humorous approach to learning Kanji, describes itself as being intended "for average people who maybe have a job or a bunch of college, and can only study an hour a day."