Patrick has made CodeSmith sing. He used it to 'rewrite xsd.exe' to our ends. Not to mention generate test data, weave in a few AOP-y things, and numerous other goodnesses. I've updated the Ultimate Tools List to reflect CodeSmith's new place in my heart. Hyperbolic? Maybe, but that's just my style:
Oh, yes, it's much more than just a Strongly Typed Collection Generator. It's a complete code-generation engine with an ASP.NET-like syntax. Very extendable, very powerful, very free. And, only $199 for the source. And all is right with the world. I've used it to generate THOUSANDS of lines of code. There's a learning curve, but the benefits are immense. It's worth the download just for the Strongly Typed Collection code from Chris Nahr.
I'm thinking of drafting Patrick to join me in giving a presentation on said tool at an upcoming PADNUG. Hm...