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.
WebCalendar is a Web-based calendar application that can be configured as a single-user calendar, a multi-user calendar for groups of users, or as an event calendar viewable by visitors. WebCalendar requires a database such as MySQL, Oracle, PostgreSQL, MS SQL Server, ODBC, or Interbase. Features include email reminders, iCal/vCal import/export, remote subscriptions for Sunbird or Apple iCal, LDAP and NIS support, and translations for 29 languages.
Connect Daily is a Web calendar and resource management application. Features include unlimited users, email reminders, public and private calendars, AJAX support, RSS, CSV import/export, and iCal support. Planner views and approvals prevent double-booking resources and make managing your facility a snap. A powerful security system provides flexible permission control. Authentication via LDAP or Active Directory is supported.
OpenPSA is a Web application designed specifically to meet the needs of Web agencies and consultants. It aims to be a one-stop solution for the management of typical agency business processes, such as project management and time tracking, invoicing and document management, and group calendars. It also includes CRM features such as sales force automation and direct marketing, and is extendable via the builtin component framework.
Tiki Wiki CMS Groupware is a full-featured, Web-based, multilingual, tightly integrated, all-in-one wiki, CMS, and groupware. Tiki can be used to create all kinds of Web applications, sites, portals, knowledge bases, intranets, and extranets. Tiki offers a very large number of features "out-of-the-box". It is highly configurable and modular. All features are optional and administered via a Web-based interface. Major features include a robust wiki engine, news articles, discussion forums, newsletters, blogs, file and image galleries, bug and issue trackers, a link directory, polls/surveys and quizzes, FAQs, a banner management system, calendar, maps, mobile access, RSS feeds, a category system, tags, an advanced themeing engine (Smarty), spreadsheet, live support, shoutbox, inter-user messaging, menu generator, advanced permission system for users and groups, internal search engine, external authentication support, and more. It was formerly named TikiWiki.
iSync is Apple's new device-synchronization software that automatically synchronizes your contact and calendar information between your Mac, your cell phone, your PDA, your iPod, and your Mac OS X Address Book. iSync also resolves synchronization conflicts no matter how many different digital devices you use. It synchronizes your data in both directions and uses the most current information. If you’ve made a number of changes and the change is unclear, iSync will ask you which information to use when you sync.
iCal is an elegant personal calendar application that lets you keep track of your appointments and events with multiple calendars featuring at-a-glance views of upcoming activities by day, week or month. iCal lets you create separate color-coded calendars for your home, school and work schedules, and it lets you view all your different calendars at the same time from within a single unified window. You can use iCal to remind you of time commitments, keep track of your deadlines, send and receive email and text-message notifications, set alarms, and even create and prioritize To Do lists.
Tasks is built on PHP and MySQL. It features a dynamic hierarchical view of your tasks, scheduling due dates, and associating URLs with and uploading and attaching files to tasks. RSS Feeds and iCalendars of your tasks are available. There is a mobile interface for use with a Web-enabled PDA or cell phone.
Copper is a Web-based project management software tool designed to help creative teams manage clients, projects, tasks, files, budgets, and events. It has an HTML/AJAX front end. It is available with full source for a licence fee or as a SAAS hosted service (compatible with iPhone, but available via PC/Mac/Linux and a Web browser).