A lightweight, no-frills alternative that focuses strictly on security surveillance and motion detection. It is incredibly stable and fast, making it perfect for low-spec PCs.

If you clarify your original goal:

Most free tools (like Windows Camera) can only handle one camera at a time. Webcam 7 Pro lets you open 2, 3, or all 7 cameras in a tiled or tabbed interface. This is invaluable for: