Project'Or RIA is project management software that tries to to gather in a single tool all functionality needed to organize your projects. It focuses on IT projects, but is also compatible with all kinds of other projects. The objective is to keep it simple and easy to use on a day to day basis.
ZEG, which stands for "Zero Effort Groupware", is a virtual appliance of SOGo intended to provide a complete out-of-the-box testing environment. SOGo is a collaboration suite (or groupware) with speed and scalability in mind. It offers calendaring, address book management, and a full-featured Webmail client along with resource sharing and permission handling. It also makes use of documented standards (CalDAV, CardDAV and GroupDAV, vCard, and vCalendar/iCalendar) and thereby enables the use of many clients and the reuse of any existing infrastructure. The appliance is prepared to be imported in VirtualBox but can also used in VMWare.
Nevede is a Web application to schedule events easily. When you start planning an event with Nevede, each participant can to go to the event's Web page to express availability. The event's page will then show the time slots that are compatible with the schedules of all the participants. Events can be made public or private. Comments can be posted in meeting pages.
Foswiki is wiki software, supporting the editing of Web pages in an ordinary Web browser by end users. What makes Foswiki special is that it supports the embedding of active and passive macros that enhance the page content (e.g. with global or dynamic information) and allow end-users to build applications that store and process data in a structured manner.
GTD-Free is personal todo/action manager inspired by the GTD (Getting Things Done) method by David Allen. It tries to be a simple and easy to use management tool. It aims to guide users to manage very efficient GTD workflow even if they are not familiar with GTD or are too unorganized to follow it. The user interface is clean and simple at each step of the workflow: the user objective should be to get things done and spend a minimum of time with the tool itself.
SamTodo is a simple PHP application that makes managing a todo list as easy as possible. It allows for a prioritized and categorized listing of information ensuring that you won't forget important tasks again. The source code is easy to understand and the entire program is stylized using CSS (so it can be easily adapted to your needs). It only requires access to a Web server that supports MySQL and PHP.