Last year we saw the release of cool key-rings 
from Marche Noir
Now we have these cool keystools 
available from GreatBigStuff
And now for a grab-bag of links:
Security
Security Tools for Windows
http://www.microsoft.com/technet/security/secnews/articles/sec_tools_for_appverifier.mspx
Trustworthy computing software development lifecycle
http://msdn.microsoft.com/security/default.aspx?pull=/library/en-us/dnsecure/html/sdl.asp
XSS Cheat-sheet (avoiding filters - I need to check if any of these can bet base ASP.NETs HTMLEncode Method)
http://www.shocking.com/~rsnake/xss.html
A good explaination (with diagrams!) of different Cross-site attacks
http://shiflett.org/articles/foiling-cross-site-attacks
An illustrated guide to cryptographic hashes
http://unixwiz.net/techtips/iguide-crypto-hashes.html
XML
Jeni’s XML Schema pages http://www.jenitennison.com/schema/index.html
.NET
LibCheck - see what’s changed in a particular assembly between versions
http://www.microsoft.com/downloads/details.aspx?familyid=4b5b7f29-1939-4e5b-a780-70e887964165&displaylang=en