I’m a big fan of the Windoor Manager from http://www.ozcad.co.au. I have been using it for several years now, in preference to the standard Vectorworks window or door. it is able to create corner windows with butted glass, glass bay windows, but it’s most amazing trick is that windows and doors can be in the same frame.
I was telling Steve Scaysbrook about windoor and he said he had never seen it, so we did a screen share thing and he recorded a short movie of me giving him an introduction to windoor manager.
To see this movie, go to Steve’s blog: