I really enjoy this website:
http://www.brainyquote.com/
You can look up topics, and find a number of good quotes, or you can look up people and find good quotes from them. For instance:
http://www.brainyquote.com/quotes/au...lt_disney.html
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I am a big fan of Fred Brooks:
Here is a Wiki article on his Mythical Man Month book and a good quote:
"adding manpower to a late software project makes it later"