You may find the following tool useful for Enterprise Architecture:
http://www.telelogic.com/products/systemarchitect/index.cfm
I guess the Popkin software been discontinued. And the former Telelogic System Architect software is bought by IBM and is now provided as "IBM Rational System Architect"
You may watch a demo of the software within the following link:
View a quick 5-minute demonstration of Rational System Architect