Free Project Management Applications

Some free and/or open source applications that can replace Microsoft Project:

 

GanttProject

Desktop-based.

http://www.ganttproject.biz/

 

LibrePlan

Web-based.

http://www.libreplan.org

 

OpenProj

Open-source

https://sourceforge.net/projects/openproj/

 

Redmine

Open-source. Written in Ruby.

http://www.redmine.org/

Projectlibre

http://www.projectlibre.org/

 

Among the non-free, there is other software like Microsoft Project or Agilefant.