Starting with RELEASE 10.0, pkg is the default package manager for FreeBSD.

After a fresh installation of FreeBSD, run pkg to get it started.

# pkg install webmin
The package management tool is not yet installed on your system.
Do you want to fetch and install it now? [y/N]: y
Bootstrapping pkg from pkg+, please wait...
Verifying signature with trusted certificate done
Installing pkg-1.2.7_4... done

So far the interface seems pretty simple / human-friendly.

pkg search vim
pkg install vim-lite