Scientific

A Short Dictionary of Scientific Quotations - A collection of quotations about science by scientists and other writers both ancient and modern.
http://naturalscience.com/dsqhome.html

The Contempt Page - Quotations against the intense dullness in today's software practice.
http://www.schnada.de/quotes/contempt.html

Against Excessive Skepticism - Find the perfect rejoinder for the closedminded doubters in your life, or gather ammunition for the next flamewar on sci.skeptic newsgroup.
http://www.eskimo.com/~billb/weird/skepquot.html

Quotes for Programmers - Quotations about software, computers and programming.
http://www.sysprog.net/quotes.html

Mathematical Quotation Server - Only mathematical quotations.
http://math.furman.edu/~mwoodard/mqs/mquot.shtml

Last Words - Negative predictions on ultimately successful technologies.
http://web.mit.edu/randy/www/words.html