Dear Professor Kanschat, please find enclosed the manuscript entitled Differential Equations and Optimization Environment; A Goal Oriented Software Library for Solving PDEs and Optimization Problems with PDEs for publication in Archive of Numerical Software (ANS) by C.Goll, T. Wick and W. Wollner. The article outlines the guiding design principles of our software environment DOpElib http://www.dopelib.uni-hamburg.de/ for the numerical solution of PDEs and optimization problems subject to PDEs with special emphasis on modular design of all components. We hope that you deem this publication worthy of publication in ANS. A tar-ball can be found on our webpage and going to 'Downloads'. With best regards, Thomas Wick (on behalf of all authors)