» Ambigram.Com
Includes Ambigram-Matic for creating your own personal ambigrams online, plus reversible matchbox art and links.
http://ambigram.com
» Ambigram.net
Various ambigram designs, based primarily on peoples' names.
http://www.ambigram.net/
» Ambigrams
Includes a few ambigrams including 2 four-word ones and a circular one.
http://thinkzone.wlonk.com/Ambigram/Ambigram.htm
» Ambigrams by Brett J. Gilbert
Small gallery of typographic designs based on people's names. Includes a variety of different ambigram types and some explanatory text describing the challenges and successes of each design.
http://www.55cards.com/paragraphic/ambigrams/
» Ambigrams by D H-N
Ambigrams and artwork by artist David Hughes-Narborough.
» Ambigrams by Stefan Gustavson
Introduction to ambigrams, information about how the writer got involved in them, recommended book, and some of the author's own ambigrams.
http://www.itn.liu.se/~stegu/ambigrams/
» Gef's Ambigram Gallery
French site in English, involving ambigrams of French people and phrases.
http://www.iap.fr/users/esposito/ambigallery.html
» John Langdon
Presentation of his artistic-like ambigrams.