From Christopher Brochtrup:
JGlossator can perform a gloss of Japanese text complete with de-inflected expressions, readings, audio pronunciation, example sentences, pitch accent, and kanji information. JGlossator will automatically gloss any Japanese text that you copy to the clipboard. JGlossator is highly configurable and allows you to modify many of the default behaviors and settings. You can also perform a gloss using your favorite EPWING dictionaries. Just add them to the Dictionary Setup tab of the Options dialog. Some of the shortcuts are: ESC for place cursor in the input box, Up for (when the input box has focus) clear text in the input box text, Backspace for (when the input box doesn't have focus) go back through the history, Ctrl + Up for go back through the history, and Ctrl + down go forward through the history.
What's new in this version:
Version 4.0 has added EDICT definition search, kanji search, Frequency save token, and fixed bug that prevents frequency lookup of katakana words.