pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
Cisco Meraki SD-WAN - What is SD-WAN?
OPNsense - OPNsense® you next open source firewall. Free Download. High-end Security Made Easy™. Offers Intrusion Prevention, Captive Portal, Traffic Shaping and more.
FortiGate SD-WAN - SD-WAN
IPFire - IPFire is a server distribution with intended to use as a firewall.
VeloCloud - SD-WAN