Making the clip was done almost exclusively using free software.

The following is a list of the free software I used (and couldn't do without):

Blender

A commercial grade 3D GPL software, used not only for the 3D animation, but also for most video editing. This was the main program I used here.
The mannequin, by the way, was made using the Makehuman plugin.

Audacity

A GPL editor which I used for the sound recording and processing.

the GIMP

I used the GNU Image Manipulation Program, as it name suggest, for creating and manipulating still pictures. It's distributed, as it name suggest yet again, under the GPL license.

VirtualDub

I used it for video proceessing, composing, and also for compression of the XviD version of the clip. And... you guessed it... It's a GPL :)