In honor of National Dictionary Day (American lexicographer Noah Webster’s birthday), Oxford University Press USA is offering free access to its online French-English, German-English, Spanish-English, and Italian-English dictionaries (oup.com/online/freeoldous/). [EDIT (6/6/10): dead link]
This free access is from October 15 to 21, 2007.
OUP also has some short quizzes about these languages:
Oh, and happy 249th birthday, Mr. Webster!