OmniPlan is a workflow solution which allows you to create logical, manageable project plans with Gantt charts, schedules, summaries, milestones, and critical paths.
OmniPlan aims to make it easier to break down tasks, optimize resources, and streamline budgets. Among its most useful features are the ability to translate strategy into tactics everyone can understand, create summaries of work broken into lists of activities, distribute workloads fairly and efficiently and manage costs as you go.
One handy feature is that OmniPlan can export projects into file formats that MS Project can read and open. MS Project is considerably cheaper than OmniPlan however and those that are thinking of switching, may take some convincing that OmniPlan can offer them a great deal more. However, the interface is slicker and more suited to OS X than MS Project but it doesn't offer quite the same power and advanced features as the latter.
If you need a change from MS Project, or something slicker, OmniPlan is an interesting simplified option for OS X.
