jxProject - Free Project Management Software (powerful constraint solver, read/write XML, muti-platform)
GanttProject - Project scheduling and management tool
Agado - Agado combines project management, invoicing and performance measurement in one intuitive workflow...
Microsoft Project - Microsoft Office Project gives you robust project management tools with the right blend of...
Milestone Planner - Visual project planning tool. Powerfully simple. Quickly build and share professional milestone plans on-line to track deliverables - Free sign up.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.