The AForge.Vision library contains some computer vision classes - set of motion detection algorithms. Full list of features is available on the project's web site.

Real-time face detection and tracking, as well as general methods for detecting, tracking and transforming objects in image streams. Contains Haar cascade definitions, Camshift and Dynamic Template Matching trackers. This package is part of the Accord.NET Framework.

Windows Forms components and controls to track head, face and hand movements and other computer vision related tasks. This package is part of the Accord.NET Framework.

An XActLib Assembly: Library to provide services that encapsulate Vision methods