I'd like to think of this as comparable to CAD for architects, except attorneys have never had any serious domain-focused assistive software, beyond word processing. Maybe some have, but it's not a well-known category that I've been able to see.
There are some packages for very specific sub-fields, things like Collection Master and such but I'm not aware of anything generic enough to cover the field of 'law'.
There is a lot out there, for everything from case management to practice management to discovery to legal research to legal composition to litigation support ...
