Bitcoin Address Utility was a tool written by Mike Caldwell (casascius) a long time ago. Because of breaking changes to .NET and various DLLs, it has not been possible to build it for several years.
It had some useful functions, such as mini-key support for those who have the Casascius coins, bulk address generation, and paper wallet generation. This image of a paper wallet generated by the tool might look familiar:

Anyway, for anyone that might be interested, I have resurrected it by migrating it to .NET 10 and fixing all the old incompatible code.
You can find my repo here:
https://github.com/odolvlobo/Bitcoin-Address-Utilityand a binary here:
https://github.com/odolvlobo/Bitcoin-Address-Utility/releases/tag/v1.1.1If you run into any problems, submit an issue on Github and I'll fix it.