There's plenty of choices; many start off with the Uniden Advanced System Director (UASD) and/or ARC396 - there are also lots of Maryland related files on the 396 Yahoo group. And if you go to the Maryland forum and ask, I'm sure folks can send you some - or become a premium subscriber, and download data directly from the databases using ARC396.
Look at this wiki
article for the relevant software links.
73s Mike