The best replacement for ufw is shorewall.

The best alternatives to ufw are rated as following:
★★★★★  shorewall
★★★★★  firestarter
★★★★  teamsters
★★★  iptables
★★★  ufw
★★★  gerawan
★★  gerawan farming
★  firewalld
★  nrw
★  apf
  firestarter ubuntu

Your alternative for ufw is not listed? Suggest!
Speaking about ufw, one probably shouldn't forget about iptables.

Other search terms related to ufw and their ratings are:
★★★★★ iptables
You have in mind a companion for ufw and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ufw in all years. Click on graph for more.
ufw
shorewall
firestarter