About.com Quotations.
Browse topics such as love quotes, Chinese proverbs, friendship quotes, and more.

Bartlett's Familiar Quotations.
9th Edition, 1901. Keyword search this older edition of Bartlett's.

BrainyQuote.
Search by keyword, topic, author, or type of author (e.g. actress, first lady, poet, etc.).

Memorable Quotes.
Over 50,000 quotes from around the world, in English and other languages. Includes international lyrics.

Quotations Page.
Over 26,000 quotations from 3,100 authors with more added daily. Includes motivational quotes, random quotes, an author index, subject index, and a way to contribute quotes.

Quotations by RhymeZone.
Search by keyword or alphabetically by author.

Quoteland.com.
A site to find useful, on-topic quotes from historical documents, great speeches, TV, music, movies, and more.

Quote Potato.
Search for quotes by author, tag (subject), or keyword. You can submit quotes, rate quotes, or sign up to have quotes sent to your email or Twitter account.

ThinkExist.
Search over 300,000 quotations by keyword, author, or topic.

Wikiquote.
A free quote database built collaboratively using Wiki software, a sister project to Wikipedia.