2do is a simple to-do list manager written in PHP and using a MySQL database backend. It supports unlimited numbers of projects, has templated HTML allowing for complete customisation, and can be publically viewable by all, or can be protected by passwords. Administration is done via simple Web-based forms.
The Net-Policy project allows system administrators to configure and manage their entire network at once. It is initially designed to configure firewall and IPsec connections across an entire network, but will eventually include the ability to control and configure just about anything. It uses a role and policy based data-model concept so reconfiguring a device usually just means assigning or removing a role to/from it. Initially the software comes with a completely configurable IPsec and IKE software suite for Linux. Stop configuring your network one device at a time!
Kaolak is a Web-based community system. A Kaolak community is defined by its users and documents and forms a Kaolak branch. Kaolak is designed to handle many branches transparently from each other, within a single instance (one URL, one database). It features a permission scheme which allows users to give read/write access to documents they own to other groups/users. With a little PHP knowledge, modules can be implemented to extend Kaolak functionality.