digchinese.com

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Kangxi Dictionary Online

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Contains a mirror of the CEDICT dictionary

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Some free content, some for-pay content. One week free trial for every email address.

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Online Chinese-English/English-Chinese translation and dictionary

Contains pinyin for each entry, simplified and traditional Chinese characters, and examples of usage (without pinyin).

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Java applet allows you to look up characters by writing them with your mouse

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Chinese-English, English-Chinese dictionary search-able by pinyin, English, and characters. Has a handwriting recognition entry tool for entry and picking of characters. Female speaker pronunciations.

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Online Chinese-English, English-Chinese searchable dictionary supported by this firefox plugin

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Free, open source, GPL, cross-platform dictionary software

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Searchable dictionary with a database of pronunciations by Chinese speakers