Free customizable calendar software for linux

Simple PHP Calendar is a a simple, extensible PHP calendar class. The project focuses exclusively on generating an HTML representation for a given month. It is meant to be easily extended for use in other applications, such as input widgets for forms, or full event calendaring applications. Its output is completely customizable via CSS.
A simple example
After downloading the class and including it in your PHP script, youre ready to start using it. The constructor requires two paramets, a year and month. The following code produces a very plain looking calendar.
1 require_once( class.Calendar.php );
2 $cal = new Calendar (2004, 3 );
3 echo "".$cal->getFullMonthName()."";
4 echo $cal->display();
Customizing the display
You can use two methods to change how the calendar is displayed. Use setTableWidth to define how wide to make the table, in pixels or as a percentage of the screen. Use setDayNameFormat to change how weekdays are displayed in the header row using strftime formats.
1 require_once(class.Calendar.php);
2 $calendar = new Calendar (2004, 4);
3 $calendar->setTableWidth(50%);
4 $calendar->setDayNameFormat(%A);
5 echo "".$calendar->getBriefMonthName().";
6 echo $calendar->display();
Final Example
You can use CSS selectors to control the formatting of all aspects of the calendar, including adding borders and how empty boxes display. Lets wrap our talbe in a div named calendar and use the following styles.
/* overall table */
#calendar table {
border:1px solid #fff;
padding: 0;
margin:20px;
}
/* the day headers across the top */
#calendar th {
background: #565;
color: #fff;
margin: 3px;
padding: 2px 5px;
}
/* how days this month will look, make dates appear in top right */
#calendar td {
background: #eee;
color: #000;
padding: 2px;
margin:0;
height:60px;
text-align:right;
vertical-align:top;
border:1px solid #fff;
}
/* these are the days falling outside this month */
#calendar td.notInMonth {
background: #999;
}
Enhancements:
- The documentation has been polished.
- An example has been added for extending the class to customize how a calendar grid will display.

My Calendar is a lightweight, easy-to-use Web calendar that is easily customizable using CSS.
There is also an included email script that you can have cron run every day to remind you of upcoming appointments.
My Calendar can also generate great looking printable calendars in Postscript and Adobe PDF format. Microsoft Outlook schedules can be easily imported.
Main features:
- lightweight and easy to setup
- email scrip to remind you of upcomming events
- email script can be run by cron and/or used to send emails to a mailing list for clugs and organizations
- easily generated pretty printable versiosn in postscript and PDF
- import events from Microsoft Outlook.
- easily customizeable with CSS and templating.

Net::Google::Calendar is a programmatic access to Googles Calendar API.

SYNOPSIS

my $cal = Net::Google::Calendar->new( url => $url );
$cal->login($u, $p);


for ($cal->get_events()) {
print $_->title."n";
print $_->content->body."n*****nn";
}

my $entry = Net::Google::Calendar::Entry->new();
$entry->title($title);
$entry->content("My content");
$entry->location(London, England);
$entry->transparency(transparent);
$entry->status(confirmed);
$entry->when(DateTime->now, DateTime->now() + DateTime::Duration->new( hours => 6 ) );


my $author = Net::Google::Calendar::Person->new();
$author->name(Foo Bar);
$author->email(foo@bar.com);
$entry->author($author);

my $tmp = $cal->add_entry($entry);
die "Couldnt add event: $@n" unless defined $tmp;

print "Events=".scalar($cal->get_events())."n";

$tmp->content(Updated);

$cal->update_entry($tmp) || die "Couldnt update ".$tmp->id.": $@n";

$cal->delete_entry($tmp) || die "Couldnt delete ".$tmp->id.": $@n";

k5n Desktop Calendar (k5nCal, for short) application is a calendar application for your desktop. It shares features with applications like Apple iCal and Microsoft Outlook, but it is open source.
This project is built upon Java Calendar Tools, and all data is stored in RFC 2445 iCalendar format.
Main features:
- Supports Mac OS X, Linux or Windows (requires Java 1.5)
- Saves all entries in iCalendar RFC 2445 format
- Simple and intuitive user interface similar
- Open source license so you can download and modify the source and use it free of charge.

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.

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.