OpenProj, Project Management software

It a program for managing projects inspired directly to Microsoft Project and that it is a viable open source alternative (not only working on Windows, but also on other platforms). Among other useful features, you can open files created by Microsoft Project. To avoid misunderstandings, I emphasize that the validity of OpenProj is not questionable, however, is not an easy to use, the information helps, but should be read carefully.
If you use Microsoft Project management already know you should not have too many problems, otherwise you will learn step by step by reading the online help available with the program.

OpenProj