Redmine, Microsoft Project, GanttProject, Focalboard, Bitrix24, OmniPlan, Smartsheet, Kanboard, Teamwork , TaskFalcon, Redbooth, Oracle Primavera, Instagantt, LibrePlan, Teamgantt, qdPM, UpSlide, Taskjuggler, ONLYOFFICE Projects, GNOME Planner, Portfolio for Jira, Agantty, SOPlanning, Weekplanner, Epicflow, GANTTzilla, PlanningForce Portfolio Planner, TIEMCHART, Resource Scheduler, OnStage, DeskAway, JREAM Projects, Omnirocket, BigGantt, Kelloo, AmiProject, Planzone are some alternatives to Gantter.