Dear COMPASS-interested, The COMPASS team consisting of RWTH Aachen University and Fondazione Bruno Kessler is announcing a new public release of the COMPASS toolset. Version 2.3 is now freely available for download on our website to anyone within the member states of the European Space Agency. The URL is http://compass.informatik.rwth-aachen.de/download.html The download also includes a new version of the COMPASS Graphical Modeller developed by Ellidiss Technologies. It provides a userfriendly click-and-draw interface for creating SLIM models visually. With respect to COMPASS version 2.2, this release includes several bugfixes and includes the following new modeling features: alarms; passive event port connections. Sincerely, The COMPASS team