TV5 Monde Alexandria
TV5MONDE presents its brand-new Chinese-English free dictionary. This on-line multilingual electronic tool operates as a terminological database, enabling users to search for the translation and definition of a word to and from 22 different languages, including Chinese.
http://www.tv5.org/TV5Site/alexandria/definition.php

Lexibase Collins Chinese-English / English-Chinese
This new on-line dictionary service provided by Softissimo enables users to look up the reference content of the famous Collins Chinese-English/English-Chinese dictionary free. This dictionary contains thousands of words and phrases with translations in context, definitions, or synonyms.
http://dictionary.reverso.net/chinese-english/

Chinese Dictionary
Chinese Dictionary is the first multilingual Chinese dictionary online. It currently offers look-up facilities for ten languages, including Chinese and English. Its interface is simple to use with just a single search box. There is no need to specify the nature of the search: Chinese, Pinyin, English– whatever the language, the program will detect it automatically. You can also find information about learning Chinese and Chinese culture on the site.
http://www.chinese-dictionary.org/

Logos
Logos bills itself as the largest freely accessible multilingual dictionary on the web, with dictionaries in 232 languages. Chinese words and phrases can be translated into English, and vice-versa, at the touch of a button. Logos also features a universal conjugator, children’s dictionary, and more than 43,000 online books in over 100 languages, including 146 in Chinese.
http://www.logos.it/

Dicts
This Chinese-English dictionary translates words from both languages instantly, and allows the user to type in just part of a word to find all possible matches. The site also features a picture dictionary.
http://dicts.info/ud.php?l1=Chinese&l2=English

Ectaco
This site offers instant translations of Chinese and English words. This free Traditional Chinese-English dictionary contains 400,000 words.
http://www.ectaco.co.uk/English-Chinese-Traditional-Dictionary/

Mandarin Tools
These pages tools to people who are studying and using Chinese. Tools include the DimSum Chinese Reading Assistant, Character Flashcards, a Chinese/English dictionary, the Chinese Namer, and the Western/Chinese Calendar Converter, as well as a character converter.
http://www.mandarintools.com/