Alternatives to Lightning for all platforms with any license

  • Google Calendar icon

    Google Calendar

    With Google Calendar, its easy to keep track of all your lifes important events in one place. You can add events and send invitations...

    Free Web / Cloud Android iPhone Chrome OS Android Tablet iPad ... Sunbird Chrome

  • Evolution icon


    Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail...

    Open Source Linux BSD GNOME

  • Apple Calendar icon

    Apple Calendar

    Keep track of your busy schedule and share it with others using Calendar. Create separate calendars — one for home, another for...

    Free Mac iPhone iPad iCloud

  • Rainlendar icon


    Rainlendar is a feature rich calendar application that is easy to use and doesn't take much space on your desktop. The application...

    Freemium Mac Windows Linux

  • EssentialPIM icon


    EssentialPIM lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and...

    Freemium Windows Android iPhone

  • Fantastical icon


    Fantastical is a flexible calendar with natural language event creation, a beautiful calendar and event list, support for CalDAV...

    Commercial Mac iPhone iPad Apple Watch

  • VueMinder Calendar icon

    VueMinder Calendar

    Take control of your schedule and get reminded wherever and however you want. Instantly access your appointments, tasks, and notes...

    Freemium Windows

  • Kin Calendar icon

    Kin Calendar

    Kin Calendar is a simple yet connected calendar, developed as a Sunrise replacement. Simple enough to help you better understand...

    Free Web / Cloud

  • Osmo icon


    Osmo is a handy personal organizer, which includes calendar, tasks manager, address book and notes modules. It was designed to be a...

    Open Source Windows Linux BSD Xfce

  • Maya icon


    Maya is a slim, lightweight, GCal-syncing GTK+ Calendar application written in Vala, specifically for elementary OS . Also looks and...

    Open Source Linux

  • Calendar icon


    Calendar, part of Office Online , is a time-management web application by Microsoft. With...

    Free Web / Cloud

  • UKs Kalender icon

    UKs Kalender

    This program helps you organizing your dates and tasks and reminds you of upcoming events.

    Free Windows

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  • BORG Calendar icon

    BORG Calendar

    BORG is a combination calendar and task tracking system. The calendar supports all sorts of appointments and also a simple todo list....

    Open Source Windows Linux

  • California

    California is a new calendar application for GNOME 3. It's currently under heavy development.

    Open Source Linux

  • CalenGoo icon


    CalenGoo gives you a fast and easy way to access and change your Google Calendar (or Google Apps Calendar) with your Android device....

    Commercial Android iPhone Android Tablet iPad Android Wear

  • BusyCal icon


    Share Calendars on a LAN and sync with Google Calendar. BusyCal combines a beautiful, personal desktop calendar with an award...

    Commercial Mac

  • Desktop Calendar icon

    Desktop Calendar

    Keep a nice, transparent calender on the desktop. Double-click on a day to enter a description.

    Free Windows

  • Active Desktop Calendar icon

    Active Desktop Calendar

    This application is a software calendar with appointments notes, tasks, alarms and contacts that provides seamless integration and...

    Commercial Windows

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  • 30 Boxes icon

    30 Boxes

    30 Boxes is an online calendering tool.

    Free Web / Cloud

  • GMinder icon


    GMinder is a reminder program that waits in your system tray and alerts you when you have an upcoming Google Calendar event. ...

    Open Source Windows

  • YouCanBook.Me icon

    YouCanBook.Me is booking software that integrates with your Google or iCloud Calendar. Get a personalized scheduling page so your...

    Commercial Web / Cloud

  • Cozi icon


    Cozi is a free online calendar that helps families coordinate activities. See who needs to be where and when, be reminded of upcoming...

    Free Web / Cloud Android iPhone Blackberry Android Tablet Windows Phone ... iPad Kindle Fire

  • Kontact - KOrganizer icon

    Kontact - KOrganizer

    KOrganizer is the calendar and scheduling component of Kontact, the integrated personal information manager from KDE.

    Open Source Linux KDE

  • do-Organizer icon


    do-Organizer includes useful tools to improve your experience and qualify you as an achiever. Store valuable information with a...

    Commercial Windows

  • qOrganizer icon

    qOrganizer Discontinued

    qOrganizer is a general organizer that includes a calendar with schedule,reminders,journal/notes for every day, to-do list. But...

    Open Source Windows Linux BSD

  • Ominder icon


    Keep track of all your Events with free SMS and Email notifications. Store and organize your Events and To-do on Ominder and never...

    Free Mac Windows Linux Android Windows Phone

  • DigiCal icon


    BEAUTIFULLY DESIGNED DigiCal’s diary planner and organizer provides a clear and beautiful overview for your events and appointments. ...

    Free Android Android Tablet

  • AnCal icon


    AnCal stores yours appointments, tasks and notes, which you can easily add and edit. You can also set alarms for selected items and...

    Open Source Android

  • Google Calendar Checker icon

    Google Calendar Checker

    Quickly see the time until your next meeting from any of your calendars. Click on the button to be taken to your calendar. Update: ...

    Free Mac Windows Linux

  • CalendarWiz icon


    An online calendar application that includes a shared calendar, website plugins, room & facility scheduling, and mobile app.

    Commercial Web / Cloud Weebly Facebook Squarespace

  • Desktop iCalendar icon

    Desktop iCalendar

    Desktop iCalendar is a handy desktop calendar for Windows. It stays on your desktop and shows the days of the current month. It can...

    Commercial Windows

  • CCalendar icon

    CCalendar Discontinued

    CCalendar, formerly Moo Calendar, is a free Windows calendar software supports Google Calendar and Yahoo! calendar. It is featured...

    Free Personal Windows

  • KeepTime icon


    A free, smart calendar with wait time reports. Wait less, do more. KeepTime is your personal, smart calendar that helps you outsmart...

    Free Web / Cloud Android

  • Visual Calendar for Tablets icon

    Visual Calendar for Tablets

    Visual Calendar will change the way you plan your life. Visually link the things you plan to do, creating logical chains. Think Mind...

    Commercial Android Android Tablet

  • Caliander icon


    Caliander is the calendar that lets you create events faster and with less effort while keeping you on top of things with its smart...

    Commercial Mac

Lightning Comments

Thunderbird/SeaMonkey + Lightning are the closer open source alternatives to EssentialPIM?

Comment by reiaasu
about Lightning and EssentialPIM, Thunderbird, SeaMonkey Sep 2015

EssentialPIM has calendar, to do list, notes, contacts, email and password list.

Thunderbird/SeaMonkey + Lightning have all these features, minus notes and password list. These two missing features can be supplemented by other open source software, such as Cherrytree and Password Gorilla.

So, I believe Thunderbird/SeaMonkey + Lightning are the open source softwares that have the feature set that comes closer to EssentialPIM.


Runs perfectly in Thunderbird 3.0.1 with Google Calendar Pr ...

Comment by Pr1me
about Lightning Jun 2011

Runs perfectly in Thunderbird 3.0.1 with Google Calendar Provider. A highly recommended add-on for Thunderbird users.