- The CDAY Calendar Almanac displays historical anniversaries such as birthdays and general events. It displays the equivalent date in multiple calendar systems, including Hebrew, Julian, JDNs, Great Underground Empire (Zork), and Shire (Lord of the Rings). Separate command line and Web-based versions are available, along with a free library of thousands of events.
- Celebrat is a very easy-to-use, non-interactive, text-mode calendar application. It reads a data file in ASCII format, and prints on stdout a human-language summary of what events will take place up to ten days from now. It also includes a small daemon which announces events that are due by putting a message on every registered terminal, or by integrating the announcement in the bottom line of GNU screen sessions.
- Chronos is a Web agenda calendar for intranets, (although it can be used from anywhere). It can send reminders by email, and lets you to schedule multi-user events. It is fast and light on resources. The balance between size and speed can be tweaked by tweaking mod_perl and Apache.
- DAViCal CalDAV Server
- DAViCal is a server implementing the CalDAV protocol for shared workgroup calendaring. It uses the PostgreSQL database for backend storage of the calendar data.
- EZ calendar
- eZ calendar is an extension to the eZ publish 2 cms. eZ calendar provides an advanced web based calendar application. Formerly known as eZGroupEventCalendar, the eZ calendar, eZ publish 2 module enables an eZ publish instance to provide a full fledged web calendar to users. eZ calendar supports recurring events, event comments, event group, event type, event category, event priority, event status, event comments, event files, event links, sort events by group, month view, week view, day view, year view, event tooltips, jscalendar date selection, new design templates,
- Emaigos is a free multi-platform software useful to import Google contacts and calendars in Emacs. Contacts are stored in a Big Brother Database (BBDB) file, which makes them usable with many Emacs email packages, like Gnus. Google calendars are stored as a single Org mode file, so that the events may be viewed as a structured document and possibly shown within an Agenda view. So with Emaigos it's possible to use Google as contacts and calendars manager, while having at the same time all data available within Emacs. The original Google contacts and calendars are not modified in any way by Emaigos. The name "Emaigos" is an acronym for "EMAcs Importer for GOogle Stuff".
- Email-reminder allows users to define events that they want to be reminded of by email. Possible events include birthdays, anniversaries and yearly events. Reminders can be sent on the day of the event and a few days beforehand. This program includes a cron job that checks for events and send reminders once a day, and a simple GUI allowing users to edit the reminders they want to receive.
- The Daily Journal, is a PIM program that is written using the Qt Tool Kit. It manages daily notes, appointments, holidays, contact and to-do lists, and issues alerts before scheduled appointments.
- GNU gcal is a command line program for calculation and display calendars. This is an implementation of the UNIX cal command developed in 1994 by Thomas Esken, then maintained for the GNU project by Giuseppe Scrivano. Gcal, the GNU Gregorian calendar program, displays hybrid and proleptic Julian and Gregorian calendar sheets, respectively, for one month, three months or a whole year. It also displays eternal holiday lists for many countries around the globe and provides very powerful methods to create fixed date lists that can be used for reminding purposes. Gcal can calculate various astronomical data and times of the Sun and the Moon for at pleasure any location; precisely enough for most civil purposes. It further contains a META-TEXT interface that creates input for formatting or displaying systems -- such as LaTeX, or WWW browser programs that visualize HTML. Gcal supports some other calendar systems, for example the Chinese and Japanese calendar, the Hebrew calendar, the civil Islamic calendar, too.
- GNOME is an easy and elegant desktop environment. It is designed to put you in control and bring freedom to everybody. GNOME is developed by the GNOME community, a diverse, international group of contributors that is supported by an independent, non-profit foundation. The GNOME project has a tradition of high-quality interface design which has been strongly influenced by usability principles and practice. GNOME software is available in a large number of spoken languages, and the project aims to ensure that its software is usable for everyone, including people with disabilities.
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