If you want a nice overview of the technology being offered for Building Information Modelling (BIM) check out H. Edward Goldberg’s recent Cadalyst article. It covers a range of BIM related solutions from VectorWorks, Autodesk, Bentley Systems, Graphisoft, Gehry Technologies, & 1ST Pricing.
There are concise descriptions of the applications each is offering and how they fit into the BIM process. Given that BIM is a process, more than just an application, it’s good to be aware of the alternatives that are out there!
“Major AEC software companies recognize that BIM, which I'll use to refer to building information modeling, affects the entire building lifecycle, and they are responding.”