Lightning Calendar Alternatives & Competitors

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

Key Simple Calendar features:

Open Source Privacy-Focused Ad-Free Experience Offline Functionality

Open Source

Spend less time managing your day & more time enjoying it.

Key Google Calendar features:

Cross-Platform Accessibility Integration with Other Google Services Collaborative Features Event Notifications

As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more.

Key DocRaptor features:

Ease of Use Customizable High-Quality Rendering Compliance

Try for free paid Free Trial $15.0 / Monthly (125+ Documents)

Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM. Platform-independent, Open Source, no installation or registration required.

Key Calendar Lock PEA features:

Cloud storage

Open Source free

Rainlendar - Customizable desktop calendar.

Key Rainlendar features:

Customizable Cross-Platform Lightweight Multiple Calendar Support

All-in-one Calendar, Tasks & Scheduler. Morgen is the single hub for everything that revolves around time management.

Key Morgen.so features:

User-Friendly Interface Cross-Platform Support Integration with Popular Tools Time Blocking Feature

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

Key UKs Kalender features:

Free to Use Lightweight Portable Customizable Notifications

GMinder is an open source Windows System Tray app that pops up to remind you about Google Calendar events.

Key GMinder features:

Free of Charge Offline Access Desktop Notifications Simple User Interface

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Key Microsoft Outlook features:

Integration with Microsoft Ecosystem Calendar and Task Management Strong Security Features Customizable Interface

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

Key Desktop Calendar features:

Accessibility Customization Integration Ease of Use

A portable calendar and diary for people on the move...

Key SSuite My Calendar Diary features:

Index Different Content Types Calendar Appointments

free

Material design open source calendar for Android.

Key Etar features:

Open Source Privacy-Friendly Customizable Ad-Free

Take control of your schedule and get reminded wherever and however you want.

Key VueMinder Calendar features:

Feature-Rich Interface Desktop Integration Flexible Reminder System Sync Capabilities

Calendar is a time-management web application by Microsoft.

Key Microsoft Outlook Calendar features:

Integration with Microsoft Ecosystem Cross-Platform Compatibility Shared Calendars Advanced Scheduling Features