Apple Mail, Microsoft Office Outlook, Things, ToDoList, ClickUp, Evolution, OmniOutliner, Postbox, eM Client, Geary, Org mode, Zenkit, Foxmail, RedNotebook, TeuxDeux, Quire, GTD-Free, Opus Domini, LifeTopix, RightNote, nPOPuk, TreeSheets, Todolicious, SkedPal, Week Plan, Lifestyle Inspector, Swift To-Do List, The Hit List, do-Organizer, Passfindr, Pegasus Mail, Orbit Communicator, GTDNext, Visual Outliner, Smart Diary Suite, Agenda At Once Free PIM, Chaos Manager, Do It Tomorrow, Dashword, Natara Bonsai, Task List Guru, Simple Mail, To-Do DeskList, Tasktop, Vitalist, Open365, Pantheon Mail, Life Balance, Todoist Wall, TodoPaper, qOrganizer, Ymail2, Nibras PKM, TaskFabric Cloud Projects, Business task, TaskUnifier, doogiePIM, Tudumo, Cloud Checklist, Taskforce, SomTodo, DoItNow!, Golden Rules Organizer, cloudpad, Black Hole Organizer, All My Journals, Qiknr, Spicebird, mGSD, AnCal, Smampi, The Now Organizer, Pimero, Todomoo, GoGetter, Timegt, todo.pink, Total Text Container, Tasskr, Visual Calendar for Tablets are some alternatives to EssentialPIM.