[[Business::timekeeping]]

Calconsole: Calconsole is a calendar and schedule command-line appliction. It is like the standard "cal" utility but with a schedule feature. It works with event data stored in ICS files which are compatible with other calendar applications.

Cday-php: 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: 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: 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,

Email-Reminder: 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.

Foliot: Foliot is an application for keeping track of time spent working on projects. It can be used in a single user mode or by small organizations.

Gcal: 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.

Gnotes 2: This is a candidate for deletion: Links broken. No links to page. Homepage not on archive.org. Email to maintainer broken.Poppy-one (talk) 16:49, 28 July 2018 (EDT) GNotes, designed for use with the Gnome Panel, lets you put yellow sticky notes all over your desktop, similar to those plastered around the edges of your monitor. GNotes are environmentally friendly as well: they are constructed of 100% recycled pixels!

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