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The Oxford-Duden Pictorial Japanese & English Dictionary is the most extensive pictorial dictionary at over 860 pages. The Japanese is given in a combination of kanji, hiragana, and katakana, but no furigana.
For an online kanji etymological dictionary, go to:
http://www.kanjinetworks.com/
denshi jisho - Online Japanese dictionary
http://www.jisho.org
EDICT - Free Japanese Dictionary File (Requires software such as JWPce or NJStar to perfom look-up and searches):
http://www.csse.monash.edu.au/~jwb/j_edict.html
JWPce - Free Japanese Word Processor with EDICT dictionary support for Windows/UNIX/Linux and Pocket PC:
http://www.physics.ucla.edu/~grosenth/jwpce.html