Free project scheduling and management tool
Multi-project management, web-based Project Management suite.
Project productivity & cost estimations tool which creates Gantt Chart
#1 alternative to Microsoft Project : Project Management & Gantt Chart
Jedule is Yet another Gantt Chart Viewer
task management, bug tracking, kanban, project management
Open Web Planning
Tool to visualize and create time-triggered schedules as gant-chart.
A Software for Flexible Job Shop Scheduling