Japanese Language Proficiency Test (English Site)
Japanese Language Proficiency Test (Japanese Site with practice exam questions)
Kanji a day
Kanji site
Hiragana Megane (allows you to view the furigana in Japanese websites)
Yookoso - Kanji and Grammar for JLPT
MLC Meguro - Free online Japanese study material
Manythings.org - A comprehensive list of Japanese study sites
