BrainyQuote.com

A website dedicated to famous and interesting quotations from many different thinkers, writers, politicians and others. Quotes are organized by subject (e.g. history, humor, society, computers, education etc), by author and can be searched by keyword.

http://www.brainyquote.com/

Wikiquote

Need a quote to complete your article or speech? Find what you need at Wikiquote, which is an encylopedia collection of a huge number of quotations from every source and in most languages.

http://www.wikiquote.org/

Creative Quotations

A large database of quotes on various subjects to inspire, especially useful for students and teachers. Some 50,000 quotes from 3,000 different people can be read here. The quotes can be searched by keyword, by topic, by nationality of the author and so on.

http://www.creativequotations.com/