The application is no longer in development. Last version, 1.4, released on October 2008, can be still downloaded from SourceForge.
This thing won't calculate project the end date based on a common resource and duration for each task.
waste of time. no better than putting it in excel really.
As per http://sourceforge.net/projects/openproj/ :This project is superseded by ProjectLibre: https://sourceforge.net/projects/projectlibre/
Our users have written 2 comments and reviews about OpenProj, and it has gotten 77 likes