ELMAH

http://www.asp.net/web-forms/tutorials/deployment/deploying-web-site-projects/logging-error-details-with-elmah-cs

http://www.hanselman.com/blog/ELMAHErrorLoggingModulesAndHandlersForASPNETAndMVCToo.aspx

http://www.troyhunt.com/2012/01/aspnet-session-hijacking-with-google.html