util-vserver is a Linux virtual server utility framework, allowing an administrator to set up multiple, isolated virtual servers. It can be used to run various services securely separated, without requiring special configuration. Virtual servers are unable to interact with each other, or the main server.
CheckNow! is a Web-based tool that enables system administrators of game servers to check on the status of their servers and manage the servers themselves. When running multiple games, the administrator is given the option of start multiple servers and switching between any of the games they have installed (in case you're just playing with 3 or 4 friends and can only run one server). It includes a news tool for the ability to provide notices of scheduled maintenance downtime, etc.
Systraq sends you a daily email listing the state of your system. If critical system files or user access files (e.g. ~/.ssh/authorized_keys) have changed, you'll get an email within a shorter notice. It consists of few very small shell scripts. It can help you implement a (not too strict) security policy.
OpenArm is an implementation of the Open Group's Application Response Measurement (ARM) standard. It provides a complete implementation of the ARM 4.0 Java interfaces, as well as ARM agent functionality that allows you to record your transaction events as log4J logging events, JMS messages, SNMP traps, JMX notifications, or as records in a relational database.
Murdoc is a system for documenting system management departments. All documents of a system management department can be put in Murdoc for convenient browsing and searching. It comes with several tools for creating content, like a Unix documenter (for automatically documenting Unix servers on a daily basis), a Windows documenter (for automatically documenting Microsoft Windows servers on a daily basis), and a Logbook writer (for entering logbook entries by the system administrators). A searching feature is included.