How many development tools for .NET?

Guess how many development tools for .NET, libraries and add-ins, I can list?

501

That's right, more than five hundred tools!
You can find them all in the SharpToolbox, which has become such a huge listing. This is not just a flat list, but a complete directory with categories, description, links and search function.
And it all started with a small list on this weblog in March last year...

By the way, if you have experience with some of the tools listed at http://SharpToolbox.com you'd like to communicate, please contact me.
I'd like to conduct small interviews to help people understand how the tools can help them for the development of their applications. I think we need some case studies and best practices to know how to design applications, and what the best tools are for a given context.
So, help promote the tools or libraries you like, and why not, expose the solutions your are the most proud of.