KanjiBase
KanjiBase is the ideal Windows-based reference tool for professional translators, interpreters, and students and scholars of Japanese.

Kanji Dictionary
Kanji Dictionary is an electronic dictionary software for displaying kana and kanji and their meanings in English. 

Kanji Drill
It is a program to help people learn kanji and kana. It also doubles as a dictionary lookup program.

KANJIDIC
The KANJIDIC file contains comprehensive information about Japanese kanji.

Kiki's Kanji Dictionary
Kiki's Dictionary is very different from other online dictionaries. It lets you browse to learn useful kanji and compounds, rather than searching for a single kanji and viewing it out of context.

The Kanji Dictionary 
Hardcover. 47,000 entries.

The Kodansha Kanji Learner's Dictionary
Over 2,230 characters in a handy, compact format, this reference book arranges kanji and their compounds according to core meanings.

The Yamasa Institute - Online Kanji Dictionary
Search for kanji characters from readings, meanings, radicals and so on.