Free calendar software software for linux

Calendar is a web-based calendar tool that produces pretty, readable calendars. NEW! Rewritten in Java for MySQL! Calendar project began out of frustration with other web-based calendar tools inability to display a readable calendar format. It was very much a project to "scratch an itch" -- to meet an immediate need that the author had. Since then, it has evolved considerably into a very useful tool that produces prettier calendars than those printed by most organizer software.
Main features:
- NEW! Subscriptions can be created to periodically fetch events from remote calendars, just like iCal and Sunbird can do.
- Events on the calendar appear exactly as typed in the admin tool -- the descriptions are not cut off in the display. This makes the calendar just as useful when its printed.
- The entire calendar is rendered in HTML -- no Flash or Java is used.
- Single-day, multi-day and occassional events are all supported. ("Occasional" events are those events that occur multiple times but dont necessarily follow a regular pattern.)
- Repeating events are supported and can repeat on a daily, weekly, monthly or yearly basis.
- Events may be categorized for easy administration.
- Nearly everything about the display is themable -- colors, fonts, border styles, first day of the week, weekday column widths, categories, etc.
- A calendar may be setup as a "private" calendar, so the user must be logged in to see it.
- NEW! A calendar may be setup as a "semi-private" calendar, so the user will only see the scheduled times but no event details.
- The admin tool is password protected and different users can be assigned different permission levels.
- Apple iCal and Mozilla Sunbird users can subscribe to the calendar with one click.
- A really bland, unimaginative name makes it easy to discuss this project without being overheard by foreign intelligence agents.
The first version of this software was written in ASP (VBScript) and ran on IIS 4.0 or higher with a database on SQL Server 7.0 or higher. The current version has been completely rewritten in Java to run on Tomcat 5.5 or higher with a database on MySQL 3.3 or higher. The feature set has grown immensely since then. The two versions have no code in common.

NetCalendar is a network capable and mostly UNIX /usr/bin/calendar database compatible Calendar application programmed in Java.

NetCalendars initial motivaion was a programming project at the Aachen University of Applied Sciences for the object oriented programming class. But it became much more than just that!

GPE calendar stores and manages scheduled events. GPE calendar supports entries without due times, recurring events (birthdays or other anniversaries), and different view modes to give the user a good overview.
Main features:
- Entries without due-time, just a note for a particular day.
- Recurring events with options for daily, workdays, weekends, monthly, yearly (birthdays or other anniversaries)
- Different view modes to give the user a good overview.

VCalendar is an open source Web calendar application with related tools, for posting and maintaining events and schedules online, in calendar format.
VCalendar project is an excellent and free solution for use by online Web communities and any commercial and non-commercial organizations. Unlike any other online calendars, VCalendar comes with source code in multiple programming languages: PHP, ASP and ASP.NET (C# and VB.NET); with potential for adding more technologies in the future.
Main features:
- Localization features, with initial Internationalization in English and Russian, with language selectable by end-users
- Dynamic CCS (stylesheet) styles, selectable by end-users
- Annual, monthly, weekly and daily calendar views
- Multiple categories for classifying calendar events
- Recurring and all-day events
- Role-based user permissions and calendar configuration
Enhancements:
- Fixed the bug reported on SourceForge Forum: 3771522: Unable to select Month or the Year

PloneiCalendar allows you to share and browse calendar files in Plone, and manage them in your calendar application.
PloneiCalendar is a product designed by Ingeniweb to handle calendar files in Plone. It is based on the iCalendar file format.
Once an PloneiCalendar is created in Plone, you can share it with other users or groups (you can give read or write permissions), browse it by day, week and month or modify it by using standard calendar applications like Mozilla Calendar or Apple iCal (or Ximian Evolution or KOrganizer or whatever you want - may be even Microsoft Outlook ;) ).
Main features:
- Upload and download your calendars in Plone
- Give permissions to users or groups to view/modify your calendars
- Browse your calendars by day, week or month
- Instantly find all your calendars with the included portlet
- View the event details
- All-day events and most recurring events are supported
- Handling of simultaneous events, even in complex cases (see screenshot)
- Handling of i18n date formats (currently, english and french formats can be displayed)
- Cool looknfeel : color integration with your plone site, personalization of the color of your calendars, 100% pure CSS in the calendar views (no table used)

PHP-Calendar is a Web-based calendar that uses PostgreSQL or MySQL to store data. It is designed to display properly only with modern browsers.
The project is designed with accessibility in mind, but does not degrade very well on Netscape 4.x.
Requierments:
- PHP 4.0 or greater
- MySQL 3.23.x or PostgreSQL 7
Enhancements:
- 0.10.6 changed the DB schema by accident. the result of this new schema is handled properly in 0.10.7. both schemas are compatible.
- updated entry in 0.10.7 to properly describe the cause.
- fixed doctype typo and updated some meta-data
- make redirects HTTP compliant to fix an issue with Safari
- allow start_monday to work again