Declan's Japanese Language Software: [Win] Commercial software that teaches kanji, hiragana, and katakana. Also available are audio flashcards software and an English-Japanese dictionary.
Drill The Kanji: An on-line Java flashcard program for studying and testing on kanji, including reading (on-yomi, kun-yomi) and meaning tests.
Gakusoft: [Win]Maker of KingKanji, a shareware Japanese / Kanji flashcard program.
gjiten: [Unix] A Japanese dictionary for Linux/Gtk, including Japanese to English, English to Japanese and Kanji.
JavaSensei: [Java] Free application for trainining the Japanese kana characters (hiragana and katakana).
jBrowse - Japanese Translation IE Plugin: [Win] A free plugin for Internet Explorer that injects furigana (phonetic hints) and word definitions in English into Japanese web pages.
JquickTrans: [Win] Software for learning Japanese and using it on their PCs.
Kana Sensei: [Win/MS-DOS] Japanese Language teaching software for beginners.
KanaSensei: Small java applet that facilitates learning of Japanese.
Kanji Gold: [Win] Japanese kanji program.
Kanji Trainer Penpen: [Win] A freeware Japanese kanji and/or Chinese hanzi study game, similar to Tetris.
KanjiQuick: A kanji dictionary software for Windows giving including 6500 Japanese characters and 47.000 compounds. Supports handwriting and animated stroke order display.
LexiKAN: Maker of flashcard software for learning to write and read Japanese Kanji and Kana.
Minddate Software: [Win] Kanji lookup and flashcard organizer software.
MOJI: A Japanese dictionary integrated to the Mozilla Firebird browser. Provides translations into English, French or German and includes a Kanji dictionary.
QuickScholar.com: [Win] Software to help you learn Japanese, focusing on hiragana, katakana and kanji.
The Monash Nihongo ftp Archive: A list of lots of Japanese educational software - includes JWP, a freeware Japanese word processor.
WaKan - Dictionary, Editor and Vocabulary: Freeware tool for Japanese and Chinese language learners for Windows. Includes character dictionary, word dictionary, editor with kanji conversion, printing (kanji cards, vocabulary, text with furigana), and vocabulary manager.