Which self-contained firewall image?

Hi, folks. I'm doing some upgrades to my home network and would like to replace my current mishmash of named, dhcp, ipkungfu, and various other network services, into a single self-contained firewall image. Back in the '00s, I used m0n0wall for this, and loved it. But I see that they have ceased development. What's the next-best solution these days if I want something like m0n0wall?

If it helps motivate your advice, my plan is to run it as a VM, not on physical hardware.

EDIT: Looks like pfsense is, by far, the most popular choice. I think I'll be trying that out. Thanks, everybody!