Cambridge Dictionaries On Line
not only provides you with a way
to search 5 different Cambridge English dictionaries on line,
you can even search the English-French and English-Spanish dictionaries
if you need to.
These are current editions, not old editions, of the dictionaries.
dictionary.com
provides definitions from several online English dictionaries.
With some examples and usage notes.
Google Glossary
automatically finds definitions of English words from web pages.
Chinese dictionary
Chúngbyān Gwóyŭ Tsŕdyăn
(Revised Dictionary of Standard Chinese), revised edition
is a complete copy of the 6-volume dictionary by the same name,
with updated content.
Excellent searching capabilities. Very good definitions,
with examples and notes on usage.
Not “complete”, but probably the best you can find on the net;
it's even more convenient to use than the paper copy.
Lin Yutang's Chinese-English Dictionary of Modern Usage
is a complete copy of the dictionary by the same name.
Excellent searching capabilities. Very good definitions.
Pronunciations of Chinese words given in pinyin;
Cantonese pronunciations can be looked up through a link.
Unfortunately, because the dictionary is quite old,
the translations may sound somewhat archaic.
Chinese Character Dictionary
lets you look up characters with various different methods,
provides you with both Mandarin and Cantonese pronunciations,
and contains data for both traditional and simplified characters.
Only definitions are provided (no examples).
Cantonese pronunciations are not provided for simplified characters.
Yahoo!-Kimo Dictionary
is a convenient tool if you don't have a real dictionary on your desk,
but the quality of its contents is not very good.
Okay definitions, with some examples (sometimes with mistakes).
Requires a graphical browser to be fully functional;
Chinese-English search does not work in text browsers.
Its advantage is its inclusion of new words, slang, etc.
Glossaries of Terms Commonly Used in Government Departments
(Hong Kong)
contains an extensive glossary of a lot of terms;
good for translations.
Fairly easy to use if you know the English term,
it is extremely difficult to use
if you want to look up the English term from a Chinese term you know.
Rex's Online Dictionary
is a meta search engine of computing terms.
Utilizing several good-quality online dictionaries as its back-end,
this site is by far the best tool in translating computing-related jargon.
Francis S.Lin's Traditional Chinese Glossary File
contains the translations used
in translating the Mozilla browser into traditional Chinese