WOA: Putting the Web Back in Web Services (a case for REST)
Managed I/O Completion Ports (IOCP) an alternate to threading? In some cases.
Web Sandbox - Microsoft Live Labs (quite useful tool, still in beta).
Microsoft Security Assessment Tool 4.0
Apdex (Application Performance Index) - open standard
Security Expert Rehabilitation (humor)
HTTP Errors in Pictures (humor)
Computer First Aid Using Knoppix (note to self - best recovery helper)