Daily Yomiuri: Words in the News - teaches terms used by the Japanese media. View vocabulary in kanji and katakana (no special software required), and get explanations of origins and meanings.
Japanese Signs - online lessons that use Japanese signs, billboards, plaques, and tags to teach practical Japanese.
Japanese Tutor, TheJapanese VAL Balloon - online beginner level lessons.
Japanese Writing Tutor - virtual workbook to help students of Japanese practice their writing skills. Following a series of animated GIFs, you can learn katakana, hiragana, and even kanji.
Japanese-Online - free tutorial that teaches Japan's language and culture through the experiences of an expatriate family newly transferred to Tokyo.
Joyo 96 - Japanese Kanji Study - turns the internet into a Japanese school for students and teachers
alike.
Learn Japanese - online Japanese lessons.
Let's Study Japanese - dialogues, audio examples of phrases and expressions, printable practice sheets for studying kana and kanji, and related links.
Manga School of Japanese - learn Japanese online with the help of Japanese comic books and other fun and games.
Masashi's Japanese Lesson - learn kana and the basics of Japanese grammar.
O-inori Radio - online educational resources for learners of Japanese. Listen to popular lyrics and translate them.
Ste-chan's Kanji of the Day -
Unfortunately, this great site has disappeared. (-.-)
Teach Yourself Japanese - learn Japanese through self-study. Site has several Java applets to help you understand Japanese.
Vashon's
Japanese Page - covering Hiragana, Katakana, and Kanji with beginner
grammar and lessons.
LEARN
JAPANESEONLINE WITH THE JAPANESE TUTOR! - OnlineJapanese language lessons, instructions, teaching materials, learning
materials, instructional resources.
http://www.japanesetutor.com/