Here are a few suggestions but there are limitation for free accounts:
- GANTTPRO: free account limit to 1 user and 1 project with basic Gantt chart features and template
- GanttProject: free scheduling and management app for Windows, Mac and Linux users (optional donation)
- TeamGantt: free account limit to 3 users and 1 project
NOTE: You are being directed to external websites and we do not have control if this information changes. So please check licensing and terms and conditions before you register to use these software.