Various software tools in wide use can be employed for this, such as Pic Master (for use with Windows operating systems), Photo Booth (Mac), or Cheese (with Unix systems).
For a more complete list see Comparison of webcam software.
Mostly, these are manual-focus cameras and contain an old CCD array instead of comparatively newer CMOS array.
The lenses of the cameras are removed and then these are attached to telescopes to record images, video, still, or both.
New features such as automatic lighting controls, real-time enhancements (retouching, wrinkle smoothing and vertical stretch), automatic face tracking and autofocus, assist users by providing substantial ease-of-use, further increasing the popularity of webcams.
Other popular uses include security surveillance, computer vision, video broadcasting, and for recording social videos.
Small webcam-based PC games are available as either standalone executables or inside web browser windows using Adobe Flash.
With very-low-light capability, a few specific models of webcams are very popular to photograph the night sky by astronomers and astro photographers.
Webcams may be installed at places such as childcare centres, offices, shops and private areas to monitor security and general activity.
Webcams have been used for augmented reality experiences online.