Bartlett's Familiar Quotations - search and browse quotations from hundreds of authors, the searchable online version of Bartlett's 1901 collection.
Motivational and Inspirational Quotes - provides more than 13,000 quotations, to search by keyword or browse by subject or author.
QuoteWorld.Org - is an online database with nearly 14,000 quotes that can be searched by person, title, quote, and exact words.
The Quotations and Sayings Database - comprehensive site to find quotations, sorted by subject and author.