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

  • 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

    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

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

    Freemium Windows Android iPhone

  • Fantastical icon

    Fantastical

    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

    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

    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

    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

  • 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

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  • California

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

    Open Source Linux

  • CalenGoo icon

    CalenGoo

    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

    BusyCal

    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

  • GMinder icon

    GMinder

    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

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  • 30 Boxes icon

    30 Boxes

    30 Boxes is an online calendering tool.

    Free Web / Cloud

  • YouCanBook.Me icon

    YouCanBook.Me

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

    Commercial Web / Cloud

  • do-Organizer icon

    do-Organizer

    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

  • 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

  • Ominder icon

    Ominder

    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

    DigiCal

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

    Free Android Android Tablet

  • CalendarWiz icon

    CalendarWiz

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

    Commercial Web / Cloud Weebly Facebook WiX.com Squarespace

  • AnCal icon

    AnCal

    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

  • Simple Calendar icon

    Simple Calendar

    A simple calendar with events (optional recurring and reminders), week numbers and a customizable widget. It provides a yearly...

    Open Source Android Android Tablet

  • 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

    KeepTime

    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

    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

  • PreMinder icon

    PreMinder

    PreMinder is an easy to use calendar with monthly, two-monthly, week or multi-week views. A handy scrollbar that lets you move through...

    Commercial Mac

  • Zoho Calendar icon

    Zoho Calendar

    Zoho Calendar is a free online calendar application that helps you to track your appointments and meeting schedule, send invitation...

    Free Web / Cloud

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.

Reply

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.

Reply