\item[cowsay] A command line utility that produces an ASCII picture of a cow saying whatever text you input on \texttt{stdin}. The package includes a few variations (called, naturally ``cow files'') which are typically located at \texttt{/usr/share/cowsay}; you can view these by using the \texttt{-l} flag, and use one with the \texttt{-f} flag. Typical output looks like: 

\begin{verbatim}
 ______________
< Linux rocks! >
 --------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||
\end{verbatim}

You can also pipe the \texttt{fortune} utility to it:

\begin{verbatim}
 -----------------------------------
/ You teach best what you most need \
\ to learn.                         /
 -----------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||
\end{verbatim}