- The Unicode Consortium
with its UniHan Database
- Chinese Character Genealogy
: An Etymological Chinese-English Dictionary : A state-of-the-art lexical product of Rick Harbaugh of the University of Pittsburg
- °ê»yÃã¨å Guoyu Cidian
: by courtesy of the Ministry of Education, Taiwan
- KanjiBase
: maintained by Christian Wittern of the University of Goettingen
- Linguistic Society of Hong Kong: with a link to the Cantonese Romanization Page (JYUT6 PING3 '93)
- Cantonese Language Association: Brigham Young University
- Yale-in-China Chinese Language Centre: CUHK
- A Hong Kong Cantonese Child Language Corpus, CUHK
- Linguist List Archive: 6.517 Sum: Cantonese tones
- On-line Chinese tools: maintained by Erik E. Peterson
- Sidney Lau's Cantonese Phonetic Transcription Scheme