As the team behind the development of the STDR Simulator (http://wiki.ros.org/stdr_simulator), we are really happy to have seen our work be used by both robotics researchers and in the education in several projects and University theses. This was made possible due to the full STDR-ROS compatibility, ease of utilization and simplicity, since anyone can setup an experiment in a few minutes.
Unfortunately, the last months we are struggling to support incoming issues, feature and pull requests, as our free time is quite limited due to personal and professional-related responsibilities. Thus we cry for assistance in the ROS community, as we strongly believe that this project must not die, concerning its usefulness till now. We propose to progressively transfer first the development process and secondly the maintaining procedure to any team that desires to continue our work. Specifically, at first we will assist this team towards merging or not submitted code, as we will try to pass on the aspired workflow and concept of the tool.
In case any team (or individual) wants to uptake the task of continuing one of few full ROS compatible 2D simulators out there, please let us know by replying to this thread: https://groups.google.com/forum/#!topic/stdr-simulator/9HXmt6wSyfE.
The STDR team