All **math.[institution].edu/~[professor]/** sites are great with, in of themselves, many links to the favorites of the page's professor. <br>
It is like walking up to the professor at coffee and asking him about the tools he uses (resources) and how it applies to his research . A big cafeteria with the world's professors ressembled and willing to answer any questions... or at least those who keep their site up to date. <br>
An example: [http://www.math.ucla.edu/~tao/][1] <br>
Professor Tao's page is mostly blue (links).


  [1]: http://www.math.ucla.edu/~tao/