monday.com, Microsoft Project, GanttProject, Focalboard, Bitrix24, Smartsheet, Teamwork , QuickPlan Pro, TaskFalcon, Open Workbench, Redbooth, Wrike, Gantter, Freedcamp, Taskjuggler, Project Office: Gantt chart, GenieBelt, Milestone Planner, GANTTzilla, Clarizen, PlanningForce Portfolio Planner, Resource Scheduler, ZilicusPM, Torch Project Management, OnePMO, ClientSpot are some alternatives to OmniPlan.