PowerWorld Viewer

PowerWorld Viewer screenshots

PowerWorld Viewer is a freeware program that can exchange power flow cases
Main window
PowerWorld Viewer 15.0 : Main window

Alternative downloads

SQL Power Architect
1.0.8
Data modeling and profiling tool.
PowerWorld Simulator GSO Education Edition
15.2012.1.25
It can simulate power systems.
Power Architect
0.9.16
FREE
It's a user-friendly data modeling tool created by data warehouse designers.