\section{The End}
\frame{ \frametitle{The End}
 \hspace{1em}
 \begin{centering}
 \hspace{-1cm}\includegraphics[height=3cm]{cactuslogo}\\
 \Huge The End\\
 \end{centering}
}

\section{Add-Ons}
\begin{frame}[label=framework] \frametitle{What is a framework?}
  A framework is
  \begin{itemize}[<+->]
   \item a reusable design of all or part of a system that is
         represented by a set of abstract classes and the way
         their instances interact
   \item the skeleton of an application that can be customized
         by an application developer
   \item an architecture, implementation and documentation that
         captures the intended use of the framework for
         building applications
   \item community building
  \end{itemize}
\end{frame}

%\frame { \frametitle{Other frameworks}
%  Many framework-like tools developed over the last few years:
%  \begin{itemize}
%    \item POOMA
%    \item Overture
%    \item SAMRAI
%    \item KeLP
%    \item PETSc
%    \item HYPRE
%    \item Trilinos
%    \item Common Component Architecture
%  \end{itemize}
%}