ACal is a web based event calendar that does not require a database server. It is made to be easy to install and to be able to run on just about any typical ISP's server with PHP installed.
Amphora Light is a freeware version of Amphora, offering basic office, intranet and groupware functionality: calendars, tasks, contacts, discussion, web email.
Annif is a minimalistic birthday (calendar) monitoring tool. Users can add/remove birthday dates, ask to be notified of birthdays. No other calendar usual features will ever be included, this tool have to be simple and to run a basic webserver.
(commercial) Calcium is a Web Calendar Server. It works on any machine with a web server that can run Perl CGI scripts.
CalDavZAP is a CalDAV Web client with a powerful event/todo editor. It is compatible with Safari/Mobile Safari, Webkit, Epiphany, iCab, Chrome, and Firefox, and supports the Davical CalDAV server.
Calendars for the Web
(commercial) Calendars for the Web provides a server based calendar and scheduling application. It allows unlimited users to share unlimted events per calendar.
CalendarTechnique is a sleek, customizable, standards compliant calendaring and scheduling application. Using CalendarTechnique, you can easily post, maintain, update and archive calendar and scheduling entries such as events, tasks and journal entries.
Calender is a php and mysql based web-application, that works as your little calendar on your desk.
Calvin is a simple PHP based calendar/reminder system suitable to keep track of birthdays, anniversaries.
CGI Calendar is a CGI-based event calendar that does not require an SQL database. It supports unlimited events per day that can be sorted by time and by summary.
Chronos is a Web agenda/calendar for Intranets (even if it can be used from anywhere). It can send reminders by email. You can schedule multi-user events. It is fast and light on resources.
(commercial) Connect Daily is an easy to use web calendar package for tracking daily events and managing resources & facilities, including your special exceptions.
Extcalendar is a huge calendar script, written in PHP and uses MySQL as a backend to store data. You can choose between Dutch, English, French, Dutch, Italian, Spanish, Arabic or Korean for language.
HTML Cal generates a clear and readable calendar in HTML format.
iCalcreator is a PHP implementation to create, parse and edit iCal (rfc2445) files for non-calendar systems like CMS, project management systems, and other applications able to support calendar information like agendas, tasks, reports, todo lists, journaling data and communicate with calendar applications.
Kronolith is the Horde calendar application. It provides a stable and featureful individual calendar system for every Horde user, with integrated collaboration/scheduling features. It makes extensive use of the Horde Framework to provide integration with other applications.
Kronophobia provides an Open Source, web enabled school calendaring system that is event based, has a lot of features, is easily and intuitively used and managed and runs on any *NIX system.
LowCal is a lightweight web calendar for apache and mod_perl featuring tabular monthly calendar and list of upcoming events with or without details.
lucid . calendar
lucid . calendar is calendaring software written with the PHP programming language interfacing with a MySQL database.
MapCal is a mapping event calendar. It has the ability to add/modify/delete events and show them on a list like other event calendars, but can also show your events on an embedded Google Map.
My Calendar is a lightweight, easy-to-use Web calendar. There is also an included email script that you can have cron run every day to remind you of upcoming appointments.
myPHPCalendar is a Web-based calendar with all the features needed for a workgroup enviroment.
Project-Based Calendaring System: an open source web-based calendaring system to be a useful tool for project managers or project planners
PHP iCalendar is a PHP-based iCal file parser. It is based on v2.0 of the IETF spec. It displays iCal files in a nice logical, clean manner with day, week, and month navigation. It supports 8 languages.
PHP-Calendar is a Web-based calendar that uses MySQL which is designed to display properly with an HTML 4/CSS2-compliant browser.
phpEventCalendar is a MySQL backed application that allows users to post and display events or notes on a month-at-a-glance calendar. A user administration panel allows authorized users (Administrators) to control who can add, delete, and edit events (Editors).
PHPWebCalendar is a feature-rich events calendar that uses Ajax. Its features include an administration panel with complete control over users and events, a portal page with news and upcoming events, multiple calendars, support for themes, a simple API, RSS feeds, Web-based installation, and much more.
Plans is a powerful and flexible Web calendar which features include recurring events, merged calendars, event icons, custom themes and templates, MS Outlook export, SQL or flat-file data storage, and browser-based management.
The Coolest DHTML Calendar
The Coolest DHTML Calendar is a DHTML popup calendar widget. It works with Internet Explorer 5.0/5.5/6.0 (5.0 and 5.5 since calendar-0.6), Mozilla, Netscape 6.x/7.0 or any other Gecko-based browser.
Unimaginatively-named Calendar produces useful, printable calendars on a Web site. It draws nice, stretchy bars across multi-day events, so you can understand what's going on. It puts all of the information you enter onto
VCalendar is an open source Web calendar application for posting and maintaining events and schedules online. A free solution for use by online Web communities and any commercial and non-commercial organizations, available in PHP, ASP, C# and VB.NET.
Web-Absence is a CGI application designed to help keep track of people in a group. It is intended to do one thing: allow the user to display the plans of all people in a group in a way that makes it easy to see who's present and who's absent.
WebCalendar is a PHP/MySQL application used to maintain a calendar for one or more persons.
WebCalendar is a powerful group calendaring and scheduling system. It is a web based application that makes it easy to publish and manage calendar events on the internet.
(commercial) WebEvent Calendar is a Web-based calendar and scheduling program.
Webical is a Web application to view and edit multiple iCalendars. Its features include progressive enhancement, a plugin framework that can be used to enhance the GUI and the back end providers, pluggable authentication, and i18n.
xml-holidays introduces an XML document type for expressing international holidays and it also provides actual holiday definitions for many countries.
Yet Another Calendar
Yet Another Calendar is a malleable, clear, concise CGI calendar. It doesn't require a relational database server and uses a single page per month for editing and viewing.