Free calendar extension 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.

eZ calendar provides a calendar extension for the eZ publish CMS.
eZ calendar is an eZ publish 2 module that provides an advanced Web based calendar application.
It supports recurring events, comments, groups, types, categories, priorities, status, comments, files, links, sorting, month, week, day, and year views, tooltips, JSCalendar date selection, and new design templates.
It features very flexible security and supports permissions on the groups that can view, add, edit, and delete events.
Main features:
- With eZ calendar you can filter the events based on the event type and for which group of people the event concerns. The eZ calendar features very flexible security and permissions on calendar administration depending on user groups specified in the admin which can view, add, edit, delete events. The public user in the prerequisite group can view either by day, month or year.
- It also supports a new dhtml, css user interphase, advanced repeat event, file/image/map attachments, directions link, html descriptions, multi-tier event groupings and many more features .
- eZ calendar is a powerful component to add into any existing eZ publish installation, especially used for collaborative and informative sites.
- eZ calendar provides calendar features which match most handheld and computer desktop datebook / calendar applications.
- eZ calendar has been extended to support every possible kind of reoccurring event type you can imagine.
- eZ calendar is a standalone module, which depends on the eZ publish framework, modules and classes.
- A special thanks goes out to everyone in the eZ publish user community who contributed to eZ calendars design, development, motivation, funding, testing, extension, feedback and so much more .

Milo Calendar is a SuperKaramba script that reads the dates stored by KOrganizer and displays them on your desktop in a clear, neat calendar.

The calendar also displays todays date and it can move back/forward months. the descriptions of the events are shown via tooltips.

The images for this theme should be very customizable. In the next versions I will try to make them compatible with rainlendar themes found all over the net!

I must thank DeVoeSquared.com for the iCal module, and rainy (rainlendar) for the theme.

Note: if you have multiple KOrganizer resources, you can change the name of the file that milo calendar reads:

the default is:
reader = iCal.ICalReader(std)
in the dir: ~/.kde/share/apps/korganizer/std.ics

Darwin Calendar Server provides a CalDAV server.

The Darwin Calendar Server is a standards-compliant server that allows multiple users to collaboratively share calendaring information. It provides a shared location on the network to store schedules, and allows users to send each other and manage invitations.

In order to provide interoperability with multiple calendaring clients, the server implements the CalDAV protocol, which is an extension of WebDAV, which is in turn an extension of HTTP.

Holidays or other events can be configured to be highlighted in a special way (using CSS styles). The days of the month can rendered with a form checkbox or radio buttons so they can be selected by the user.

Rendering of the different calendar elements can be configured using CSS styles. The names of the months and days of the week can be configured, so that they’re displayed in a language other than English.

This class is licensed under the GNU Lesser General Public License (LGPL), so feel free to use it, modify it as you want, although a little credit is always welcome.

IMAP Calendar Proxy implements an HTTP proxy that converts HTTP PUT requests of vcalendar data to separate messages stored on an IMAP server.

IMAP Calendar Proxy project can be used with Mozilla Sunbird/Calendar to allow storage of a calendar via IMAP.

There are many issues with the program in its current state. Consider it alpha quality, and you may lose calendar data if you use it. Its more of a proof of concept right now. Its rather slow if you have a large calendar.

Ideally IMAP support should be built into Mozilla. This is just a hack. Id like to hear any feedback on how it works. See the TODO file for features Id like to implement.

Sunbird can post calendars to a remote HTTP server via HTTP PUT and to
synchronize via a GET before a PUT. This proxy should run on the same system
you run Sunbird on. It makes a connection to an IMAP server and selects
a specified folder.

It then retrieves all calendar data from that server and caches it it memory. Any changed to the calendar are HTTP PUT to this proxy, and it determines what to do on the IMAP server (delete, change, add). Instead of posting the whole calendar back to the server, it only posts the differences.

If you run the proxy elsewhere on the network, you will not get any bandwidth
savings because the HTTP PUT and GET are still done over the network.