  The goal of this paper is to present an overview of the software collection
for the solution of linear and nonlinear semidefinite optimization problems
PENNON. In the first part we present theoretical and practical details of the
underlying algorithm and several implementation issues. In the second part we
introduce the particular codes PENSDP, PENBMI and PENNON, focus on some
specific features of these codes and show how they can be used for the solution
of selected problems.
