Tom's Planner is described as 'Toms Planner allows you to create and share Gantt Charts online with "drag and drop" simplicity. It has great ease of use and gives control back to the project manager' and is an app in the office & productivity category. There are more than 25 alternatives to Tom's Planner for a variety of platforms, including Web-based, Windows, Linux, Mac and iPhone apps. The best Tom's Planner alternative is GanttProject, which is both free and Open Source. Other great apps like Tom's Planner are Microsoft Project, Smartsheet, OmniPlan and LibrePlan.