中文工具網站 recommended by SP Ha
The Pristine Lexicon is a free, online Chinese-English, English-Chinese lexicon and dictionary for language learning, technical research and general use.
InstantSpeakChinese - a talking English-Chinese dictionary.
Chinese Character Dictionary
Zhongwen.com contains the complete text of Chinese Characters: A Genealogy and Dictionary using my character tree system. Distributed by Yale Univ. Press.
Lexiconer Chinese English Dictionaries
漢英詞典Chinese English Dictionary