What is the best security camera software? What is the difference between NVR and VMS?

IP Camera Software can keep eye on your home, office, parking area, or anywhere you have an IP camera.
View video from multiple cameras simultaneously. What ip camera software is the best?
iSpy: Open Source Camera Security Software
Open source camera security software. iSpy provides security, surveillance, motion detection, online access and remote control.

Download free IP Camera Software from here