1. Best open source project management tools: ProjectLibre
ProjectLibre was designed as an open source desktop replacement for Microsoft Project. Product features include Gantt chart, network diagram, WBS/RBS charts, earned value costing and resource histograms, in addition to its compatibility with Microsoft Project.
The free software has been downloaded more than 2,700,000 times since it was released in 2012 The company also plans to launch a cloud project management tool called ProjectLibre Enterprise Cloud available through a monthly subscription fee.