MC4J provides a rich management interface to Java Management Extensions (JMX) based servers. It displays a tree structure of the managed components and provides the ability to view, alter, and graph attributes of live state. It currently supports JBoss, WebLogic, WebSphere, and Tomcat application servers as well as those based on JSR 160, MX4J, or JMX Reference Implementation services.
Nageographer is a graphical utility to aid in positioning icons on the status display maps in Nagios (a network monitoring tool). Nagios, as shipped, requires you to enter coordinates for each icon you want displayed on the status map. This utility lets you drag the icons around where you want them and will save your coordinates back to the config file for you.
Flawless traps exceptions and then uses git blame to send an email to the developer who wrote the buggy code. Even if a particular line of code causes thousands of exceptions, only one email will be sent. It uses git-blame to figure out which developer is responsible for a particular exception, and will only email that developer. If you set report_only_after_minimum_date, then Flawless will only report exceptions caused by code modified after report_only_after_minimum_date. You can mark certain files/functions as library code, and when an exception originates in those files/functions, the caller will be blamed for the error instead of the library code.