You may also have a look at Steel Solutions.
As far as functionality, custom solutions, and features, they really can't be beat.
They are small and the software doesn't look as cool as Fabtrol's, but there are things Visual Steel 2000 does that Fabtrol can't touch in terms of labor tracking, multing, data integration, bar-coding, etc...
www.steelsolutions.com
A lower end, but still very good app is called Fabsuite by www.steelssc.com . As I said, it is smaller, but the interface is really good and the multing is just awesome.