Fundamentals of Classical Arabic - an excellent set of resources, with pdf documents and accompanying audio - site
Translation of and discussions on one of the best books of Nahw (Arabic grammar) - site
Word-for-word translation of the precious words of The Qur'an - site
80% of Arabic words in The Book of Allaah - excellent resources for studying and interactive self-testing - site. See also here and here
Qur'an is the best way to learn classical Arabic, and tajweed (correct pronunciation of the Qur'an) is the best way to learn the classical pronunciation of Arabic. A great website for healping learn Tajweed - site
Comprehensive set of textual, audio, and video resources for learning Arabic - site
A rich set of learning Arabic for English-speakers - site
Advice, and many links online resources, for learning Arabic site
Good set of books for learning Arabic, with descriptions of the resources in English - site
