Free Track is a free webcam motion-tracking application for Microsoft Windows that can track a special head-mounted model in up to six degrees of freedom and output data to mouse, keyboard, joystick and Free Track-supported games.By removing the IR filter of the webcam, IR LEDs can be used, which has the advantage of being invisible to the naked eye, removing a distraction from the user.Some of them, for example, those used as online traffic cameras, are expensive, rugged professional video cameras.making them the lowest-cost form of videotelephony.When "captured" by the computer, the video stream may be saved, viewed or sent on to other networks via systems such as the internet, and emailed as an attachment.When sent to a remote location, the video stream may be saved, viewed or on sent there.Webcams may be installed at places such as childcare centres, offices, shops and private areas to monitor security and general activity.
For a more complete list see Comparison of webcam software.
The most popular use of webcams is the establishment of video links, permitting computers to act as videophones or videoconference stations.
Other popular uses include security surveillance, computer vision, video broadcasting, and for recording social videos.
In December 2011, Russia announced that 290,000 Webcams would be installed in 90,000 polling stations to monitor the Russian presidential election, 2012.
Webcams can be used to take video clips and still pictures.