Siebel Monitoring Tools provides monitoring of Siebel servers through Nagios plugins and SNMP. It can monitor status of components, resource consumption (by component), task information, and anything else which might be interesting.
statsd-go is a reimplementation of statsd in Go (forked from gographite) with Ganglia submission support.
An offline application for Wikipedia (and other wikis).
A simple console MP3 player.