Quotations

Bartlett's Familiar Quotations - A collection of passages, phrases, and proverbs traced to their sources in ancient and modern literature. By John Bartlett, 9th ed., 1901.
Creative Quotations for Creative Thinking - A rather haphazardly arranged site which has "quotations from famous people on their birthdays linked to five components of creativity: foraging, reflecting, adopting, nuturing, and knuckling down." Has 25,000 quotations which are searchable by keyword, author, nationality, profession, and source.
Famous Quotations Network _ This site has annoying pop-up advertising but is well organized and searchable. You may sign up to get a newsletter of new quotes each day.
Mathematical Quotation Server - From Furman University, this page points to a collection of mathematical quotations culled from many sources.
Quotations Archive - According to the opening page, "the Quotations Archive is a comprehensive, searchable database of general purpose quotations. Visitors to the web site can browse through quotations by subject, alphabetically by author, or they can use the search engine to generate a listing of quotations containing selected keywords or by a certain author."
Quotations Home Page - This page by Steve Spanoudis indexes over 24,500 quotations by topic, by speaker and by collections.
Quotations Page - This page was originally developed as a catalog of quotation resources on the Internet; it has since evolved into a large-scale quotation site with many original resources.
quoteland.com - Quotations on every topic, by every author, and in every fashion possible - This site has quotations on every topic imaginable.
Quotez - Over 13,500 quotes on 500 subjects - arranged by author as well as by subject.
Simpson, James B. 1988. Simpson’s Contemporary Quotations - From the Bartleby project, this resource "provides over 10,000 quotes from over 4000 sources, including 25 categories of quotes, and 60 sections, ranging from “love” to “criminology.” Full, concise information is given for each quotation, including source, date, and occasion. This comprehensive reference contains words of wit and wisdom from such modern notables as Ezra Pound, Henry Kissinger, George Orwell, Dorothy Parker, and Desmond Tutu."