Comparison of firewalls

Columns: Firewall | License | Cost | OS
Juniper SSG | Proprietary | Included on Netscreen security gateways | Proprietary operating system ScreenOS | Juniper SRX | Proprietary | Included on SRX security gateways | Proprietary operating system Junos | Sonicwall | Proprietary | Included on Dell appliance | Proprietary operating system SonicOS Based on the Linux kernel | Barracuda Firewall | Proprietary | Included Firewall Next Generation appliance | Windows -based appliance embedded firewall distribution | Cyberoam | Proprietary | Included Firewall Sophos appliance | Windows -based appliance embedded firewall distribution | D-Link | Proprietary | Included Firewall DFL | Windows -based appliance embedded firewall distribution | Endian Firewall | Proprietary | Free / Paid | Linux -based appliance

Example questions:
What is the OS of the comparing firewall appliance that has 550+ employees across the Earth ? | What is the cost of the comparing firewall appliance that was created in 1994 as an IT reseller termed NetPartners ? | What is the license of the comparing firewall appliance that can be equipped on any IA-32 computer with almost any Ethernet interface ? | What is the comparing firewall appliance whose license allows users to use the software for any reason without burden for royalties ?

Answers:
Windows | Included on all Forcepoint NGFW devices | GPL | pfSense