Xmind - Xmind is a brainstorming and mind mapping application.
zkanji - zkanji is a free and open-source study tool and dictionary of the Japanese language.
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
Jisho - Powerful and easy-to-use online Japanese-English dictionary with words, kanji and example...
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
RomajiDesu - RomajiDesu is a free online bi-directional Japanese-English dictionary, Kanji dictionary, Sentence analyzer and Japanese to Romaji/English translator, and Romaji to Hiragana/Katakana Converters for Japanese learners.