Free Microsoft Project alternative
When working on a large project with many people involved, project management software can be very useful in keeping everyone on track as well as keeping an eye on the big picture. If you don’t want to spend the thousand dollars it costs to buy Microsoft Project, the project management software, you might consider the excellent OpenProj which is a completely free software package available on Linux, Unix, Mac or Windows.
Link
Tibi on January 13th, 2012
For those that need more features RationalPlan is a better alternative to MS Project:
http://www.theprojectalternative.com/