OpenProj is an open source project management software application.

GanttProject is free Java based, project management software that runs on the Windows, Linux and Mac OS X systems.

ProjectLibre is an open source, freely available project management software system intended ultimately as a standalone replacement for Microsoft Project.

GNOME Planner is a cross-platform project management tool based on the Work breakdown structure (WBS).

Bric is software that helps you manage your professional services team’s time.

Avaza is a beautiful online software suite with modules for Project Management, Timesheets, Expenses & Invoicing. Access from anywhere, with any device.

Skwish freelance is a project management tool packed full of features to help manage scopecreep; collaborations, finances, invoicing and teams you're working …