For “commercial but free” There is AxxonOne (was AxxonNext) But free only allows 4 cameras. However this is best out of all FOSS in terms of what it can do.

For FOSS there is: Frigate Shinobi Zoneminder iSpy Viseron Moonfire NVR motionEyeOS

Lots of options but you will need some baremetal or a decently powered server and hypervisor to run in a VM.