I came across the ReviTTools plug-in for Revit a few years back using Revit 2008 and found it quite useful but also full of bugs. It looks like it has now developed to be a very useful and stable tool! I have used it in Revit 2010 and found it very productive. The Revit 2011 version is soon to be released.
My favourite feature is the excel import for room data and is very easy to use. The door handing (room to room) feature took me a while to get my head around but now I have it working successfully. There are lots of other features in this plug-in so download it and have a play with it yourself.
Here is what ReviTTools have to say about the plugin:
"With reviTTools you can expand the brilliant functionality possibilities of Revit Architecture, Revit Structure or Revit MEP software products. These new capabilities fitting to the integrated BIM philosophy will speed up your daily tedious tasks and will allow you to have less errors."
Overall this is a great plug-in which has now found it's feet firmly in the Revit market. The great thing about the licencing is that you can use it for free if you can tolerate the splash screens after every command... which means it's great for students! The corporate licencing is great value and well worth the money.
Visit the website and download it here: www.revittools.com