We released a new version of the Activiti Designer Eclipse plugin (5.18.0). This release is available on the following URLs (as always):
http://www.activiti.org/designer/archived/activiti-designer-5.18.0.zip (archived site)
http://www.activiti.org/designer/update (update site)
Note that the 5.18.0 release includes improvements to the BPMN palette with support for compensation and cancel events and transaction sub processes. Messages and signals are now defined at process root level and can be selected in the event element. We also improved pool and lanes handling and moving and resizing of containers so that bendpoints and boundary events are also moved correctly.
The Activiti Designer now supports Kepler and Luna. Let us know if you want us to move to Luna and Mars instead.