Crypto Code
No, I'm not talking about deciphering your coworkers code.
Actually, I was looking into the System.Security.Cryptography namespace to answer a question on CodeProject when I stumbled across this. It turns out, GDN has the entire source for the Crypto classes in .NET. Am I really late to the party or has this been published unnoticed? Anyway, it's pretty darn cool. After a quick glance it doesn't look like Rotor has the source for the Crypto classes, so this is a great resource for anybody doing work with them.