Lightning Calendar Alternatives

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

Spend less time managing your day & more time enjoying it

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.

open-source

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

Rainlendar - Customizable desktop calendar

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

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

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

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

free

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

Material design open source calendar for Android.

Calendar is a personal calendar app made by Apple Inc. that runs on both the macOS desktop operating system and the iOS mobile operating system.

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