
1) Virtual reality
Found on
https://www.crosswordclues.com/clue/freetrack

FreeTrack is a general purpose optical motion tracking application for Microsoft Windows, released under the GNU General Public License, that can be used with common inexpensive cameras. Its primary focus is head tracking with uses in virtual reality, simulation, video games, 3D modeling, computer aided design and general hands-free computing to i...
Found on
http://en.wikipedia.org/wiki/FreeTrack

===Downy Woodpecker2=== Category:Featured picture nominations Category:Featured picture nominations/November 2007 ...
Found on
http://en.wikipedia.org/wiki/Freetrack
No exact match found.