http://www.altamatematica.it/ (INDAM)
http://www.netlib.org/ (netlib)
http://www.netlib.org/na-net (Numerical Analysis Network)
http://www.ams.org/mathscinet (Mathematical Reviews)
http://www.emis.de/ZMATH (Zentralblatt MATH Database)
http://www-fp.mcs.anl.gov/otc/Guide
http://www-neos.mcs.anl.gov/ (Server for Optimization)
http://plato.la.asu.edu/guide.html (Decision Tree for Optimization Software)
http://www.siam.org/(Society for Industrial and Applied Mathematics)
http://www-unix.mcs.anl.gov/otc/InteriorPoint/index.html
http://www.netlib.org/scalapack/ (Scalapack user's Guide)
http://www.nag.co.uk (NAG)
http://www.cse.clrc.ac.uk/Activity/Lancelot (Lancelot)
http://www.cse.clrc.ac.uk/Activity/CUTE+72 (CUTE)