California

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

Free Open Source Linux

Yahoo! Calendar

You can view an entire month or focus on a specific date and time. You can also assign colors for different calendars and to-do lists, and drag-and-drop events...

Free Web

OrgCalendar

A fully-functional scheduling WEB-application. The easy way for any organization to have a Internet-calendar within minutes! You simply place the OrgCalendar onto a your...

Commercial Web

qOrganizer

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

Free Open Source Windows Linux BSD

MemoCalendar.net

Light-weight and easy-to-use online calendar like a usual memo calendar on the wall.

Free Web

SSuite My Calendar Diary

SSuite My Calendar Diary Portable is a software utility whose purpose is to provide individuals with a simple means of keeping better track of their schedule. ...

Free Windows

RMP3

Remind-Me-Please is a freeware reminder program which will give you advance warning of upcoming events, appointments, TV programs, movies, birthdays and so on. Enter...

Free Mac OS X Windows Linux Mono

Zoho Calendar

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

Free Web

Attendexer

With Attendexer you can use the Calendar Insights functionality to gain extensive, and insightful information about your calendar.

Free Open Source Web

wtplan

wtplan is a calendar program with a terminal interface, a web interface and git integration.

Free Open Source Mac OS X Windows Linux Self-Hosted

Altarsoft Events Manager

A program to organize your events with events reminders.

Free Windows