Free Light Japanese - Learn the Japanese writing system (Hiragana, Katakana and 1945 Jouyou Kanji which all Japanese pupils should learn before going to university), vocabulary and pronunciation by using multimedia techniques. [Despite the name, it's not freeware]
Learning Japanese through Cartoons - a program which uses a comic cartoon style to introduce over 200 sentences of practical daily Japanese conversation, like food and drink, shopping, and saying "hello". The contents are humorous and vivid. [software for Windows]