Centralized Logging to a database with alerts and powerful RCP-UI
LEMA is an easy to use Log-Server. It supports asynchronous logging of multiple applications (log4j-appender). The logs are processed and save to a database. An RCP-UI supports Live View, History View with advanced filters. You can use it for Error Monitoring / Notification; in order to do this a rule-based labellng (for instance stacktrace grouping) is performed by the server.
Animated display of server processes using php and imagemagick. Analog and bar style guages are animated and appear to be "live". Your server must support multiple simultaneous image create calls and have imagemagick installed and accessable from the web