Known for its "Lego-like" interface, Xeoma offers a free version that is highly flexible and works on Windows, Linux, and Mac.
One of the most popular open-source options, iSpy supports an unlimited number of cameras. It features advanced motion detection and can even send alerts to your mobile device. network camera networkcamera free
A top choice for Linux users, ZoneMinder is a robust, open-source system designed for both home and commercial use. Known for its "Lego-like" interface, Xeoma offers a
