sYnergy is a Web-based groupware and communication solution for use with an intranet. It includes email mailboxes, a fax viewer and sending function, contact lists, an appointment and task management function, a picture database, and a function for listening to voice messages. The extensive user management enables administrators to assign various permissions to each user and to exchange data e.g. contacts, appointments, or tasks. It also offers a function to import existing data.
XPTracker is a radical alternative agile planning tool aimed at keeping out of your way and making sure you can see the stuff you care about at a glance. Included in this tool is a very advanced search system based on Lucene, an easy-to-use planning system based on Queues, and a customizable reporting engine (with burndown/scope creep charts) called Timelines.
OpenGroupware.org is a set of applications for contact, appointment, project, and content management. It is comparable to Exchange and SharePoint. It is accessible using Web interfaces or using local clients via WebDAV, GroupDAV, and CalDAV. Custom applications can be developed using the XML-RPC API. OpenGroupware.org runs on almost every GNU/Linux system.
The ZideStore server is a native client integration server for OpenGroupware.org. Users can access the contact, appointment, and task database using Outlook, Evolution, and almost any iCalendar compatible client (such as Apple iCal or Mozilla Calendar). In addition, ZideStore supports WebDAV to make the OGo document stores accessible for MS Office and OpenOffice.org.
pin 'em up is a tool for placing small notes/post-its (e.g. TODOs/reminders) on your desktop and organizing them in various ways (categorize, hide, upload, export, etc.). Due to platform independence, the notes can also be shared on different operating systems. It features system tray integration, freely placeable notes, many possibilities to customize the note design, (nearly) unlimited user-defined categories, fast switching between categories (e.g. "home" and "office"), automatically saving notes to a file, an open file format (XML), server upload/download functions (FTP and WebDAV), and exporting notes to a text file.