Gantter is a project planning and management application running from a web-browser. With Gantter you can do similar things you do in Microsoft Project in a similar way: plan your project, review your plan using Gantt chart, manage project resources and calendars, review critical tasks, estimate project cost, control your project progress.
It supports different task dependencies (including lags between depending tasks), task constraints and task types. Gantter performs all the scheduling and other calculations to make planning easy. You can mark a task as a milestone or set task deadlines. Gantter uses Gantt charts to illustrate your project plan which is the most convenient and recognized way of project plan illustration.