Memo is a small utility which you can use to store appointments and 'TODO' items.

gsmcal2html downloads calendar events from a GSM device and creates an HTML calendar.

iKog is a very simple utility designed to make the management of your to-do lists quick and easy.

GetMeDone is a task manager in the spirit of Getting Things Done.

Opensched is a tool for project management.

Really Simple CalDAV Store project is a server implementation of the CalDAV protocol for storing calendaring resources.

Rapla's objective is to provide an easy-to-use resource-management system.

PHP EMS Tools project is a software for volunteer and small paid emergency medical services.

JOpt.NET is an automated routing software and dispatching component for .NET and can be integrated with C#,C++,VB and J#.

cstermin project is a small scheduler for keeping track of recurring events like birthdays or one-time appointments.

Webical's goal is to create a webapplication that allows somebody to manage multiple WebDAV hosted calendars.

DailyTasks project is a program for reminding you of daily tasks.

k5n Desktop Calendar application is a calendar application for your desktop.

GanttPV is a project scheduling software.

hipergate is an open source web based application suite.

The Sunbird Project is a redesign of the Calendar component.

KFocus is a personal project management program with support for task lists and log books.

The Job Scheduler runs executable files, shell scripts and database procedures automatically.

Redminer is a GNOME desktop sheduler tool.

PHP time management is a Web-based time management application.

Kronolith is the Horde calendar application.

Yank is a simple notekeer and todo-list manager using the gnome and gtk libraries.

Java Date Picker is a suite of professional date components for Swing.

Connect Daily, a Web-based calendaring system, allows multiple users to add and edit calendar events using a Web browser.

Unimaginatively-named Calendar produces useful, printable calendars on a Web site.