qOrganizer

qOrganizer is a general organizer that includes a calendar with schedule,reminders,journal/notes…

Caliander

Caliander is the calendar that lets you create events faster and with less effort while keeping you…

Day-O is a simple menu bar clock replacement with a simple calendar for your Mac.

Material design open source calendar for Android.

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

Organize your life — it’s about time!

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

A pocket-sized device for instant photo printing

Turn your smartphone into a Polaroid

Rainlendar - Customizable desktop calendar

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

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