bash is installed in the FreeBSD basesystem by default.

```
[jps@~]$ bash --version
bash --version
GNU bash, version 4.2.20(0)-release (i386-portbld-freebsd9.0)
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
[jps@~]$ which bash
which bash
/bin/bash
```