Multicraft is a Minecraft server admin that lets you start, stop, restart, manage configuration, plugins and server code for your own Minecraft server.
Miniflux is a minimalist and open source news reader.
LazyLibrarian is a program to follow authors and grab metadata for all your digital reading needs.
Mediatomb is an UPnP MediaServer that allows you to stream your digital media through your home network using a variety of UPnP compatible devices.
Munin is a web-based monitoring tool to help analyze resource trends. It is designed to be very plug and play. A default installation provides a lot of graphs.
ITDB is a web based asset inventory management tool used to store information about assets found in office environments.