zlacker

Assuming you're talking about running like a UI router and doing multi-WAN uplinks from it, you can.

They support load balancing (e.g. 95% WAN1, 5% WAN2) and SLA monitoring (ping/packet loss/jitter) with some voting options on what triggers a swap.

I think pfsense has similar options for WAN balancing if you don't like UI for routing.