CustomUltraseek is an independent site for developers and administrators using Verity’s* Ultraseek search engine.
I used Ultraseek back at EPRI in the late 1990’s, and was impressed with the ample hooks for customizing it through Python.
Since I worked with it last, Ultraseek has been updated to consume and index PDFs, Office documents, and XML.
* Verity bought Ultraseek from Inktomi last year. Inktomi bought it from Disney.