I noticed that in addition to the software, there is a bunch of other stuff you can currently get for free (models, plugins, etc):
Keep in mind though that a few of these free items require models/plugins that cost money. So make sure to check the description before you download.
ETA: Oh, and thanks Ptrope
ETA 2: I wanted to make special note of the motion capture recorder. Yes, as in the kind of stuff they do for CGI characters in movies. For free. You need to have a Kinect, or multiple PS3 Eye or other DirectShow compatible cameras to make use of it, though. It's the product called "iPi Recorder".