What are some alternatives?
When comparing Zebra-Media Surveillance System and iSpy, you can also consider the following products
MotionEye - motionEye is a web frontend for the motion daemon, written in Python.
ZoneMinder - ZoneMinder is a free and open-source piece of security software that can be used at home or in your business. The software puts you in control of all of your data, and it is exceptionally easy to setup. Read more about ZoneMinder.
Blue Iris - Blue Iris is a high end security monitoring system that lets you view and control the feeds from all the cameras at your home or place of business.
Sighthound Video - Sighthound Video | Free Smart security camera software for your home or business. Sighthound empowers cameras with powerful computer vision technology that can be deployed in minutes.
motionEyeOS - A Video Surveillance OS For Single-board Computers
Contacam - This Free Video Surveillance and Live Webcam software for Windows is extremely easy on system resources, and does not contain unnecessary bloat.