NuFW source is available here for download.
The lastest stable branch is 2.2.
This is the recommanded version of NuFW.
nufw-2.2.15.tar.gz (GPG)
nufw-2.2.15.tar.bz2 (GPG)
This is the deprecated previous stable branch. The only updates are for bugfixes and security.
nufw-2.0.22.tar.gz (GPG)
nufw-2.0.22.tar.bz2 (GPG)
This is a deprecated stable branch. The only updates are for security.