Todoist, Microsoft To Do, Things, Workflowy, TickTick, Focalboard, TaskPaper, Taskwarrior, Amazing Marvin, Task Air, TeuxDeux, Taskworld, Hitask, MyLifeOrganized, momentum.earth, Quire, Condution, Remember The Milk, Gtdagenda, Todolicious, iGTD, do.com, WeekToDo, TaskQue, Swift To-Do List, Nirvana, The Hit List, Taskheat, AM-Notebook, ThinkingRock, Do It Tomorrow, Jot+ Notes, SingularityApp, IQTELL, Comidor, TaskLite, Vitalist, Online To Do List, Pomotodo, Flow Task Manager, Webplanner, Todo.ly, Firetask, Gotstado, Task Office: to-do, calendar, Flowlist, quuxTodo, NotePub, TaskFabric Cloud Projects, FCorp My Calendar, Nottingham, What-Do?, Todoey, Eggscellent, Memability, Countersoft Gemini, Mydoid, abcNotes, DoItNow!, Catch Notes, dstask, Taskline, cloudpad, Taskian, jiPANEL, Do Now, Quantus Tasks, Daymate, Midnight Inbox, TickTasks App, LiquidTime, Note-C, Timegt, Arktik, Efeqti, Cloudship, UbikFocus, MiniTD, Tasskr, OnePunch Notes are some alternatives to OmniFocus.