Projects / Calcium


Calcium provides interactive calendars you can use through your browser. Features include: dynamic calendar merging (events from one calendar can be included in another), multiple views and formats, repeating events, email support, extensive color and font customization, support for full HTML in the event text and calendar headers and footers, popup text associated with any event, searching and filtering, multi-language support, a flexible security model, and more. Calcium is very easy to use, and fully supported by an established company. It runs anywhere that supports Perl CGIs; no non-standard Perl modules are necessary. Full 2-way synchronization with Palm Pilots or MS Outlook is available; iCalendar "subscriptions" are supported too.

Operating Systems

Recent releases

  •  28 Nov 2006 22:16

    Release Notes: Major new features include support for Custom Fields, Templates, RSS Feeds, and iCalendar publish/subscribe. There are many other new things and improvements.

    •  13 Jan 2005 16:05

      Release Notes: New features include support for multiple categories per event, user groups, customizable time increments in the Time Plan views, better CSS support, more control over the event entry form, LDAP authentication, the ability to double-click to add or edit events, and many other things.

      •  10 Nov 2003 15:14

        Release Notes: New features include the ability to easily set preferences in multiple calendars at once, a weekly "Time Plan" view, defined Time Periods, per-calendar customized email subject lines, an email selection popup window on the event entry form, bannerized repeating events, a link to add an event directory from notification email, and more.

        •  22 Jan 2003 21:38

          Release Notes: New features include email subscriptions, iCalendar/vCalendar support, printer friendly views, user timezone support, fiscal year views, and more. There's also a new version of TripleSync, the desktop and Palm OS synchronization client.

          •  17 Apr 2002 16:33

            Release Notes: New features include support for full Palm Pilot synchronization, "tentative" event submission, improved permissions management, and an assortment of more minor changes and bugfixes. A nice off-line editing tool is also available.


            Project Spotlight


            A Fluent OpenStack client API for Java.


            Project Spotlight

            TurnKey TWiki Appliance

            A TWiki appliance that is easy to use and lightweight.