GARP (Gnome ARP) is an ARP monitoring program written on Gnome with the GTK toolkit and Ruby. It takes ARP tables and some system variables via SNMP and ARP protocols and determines whether any machines have changed their IP address. It is useful for detecting new machines on the network and detecting which machine have changed addresses. It is intended especially for network admins.
SSHMenu is a GNOME panel applet that makes starting up a new terminal window with an SSH connection to a remote host just a click away. A preferences dialog allows you to add and organise hosts. Window positions and sizes can be set along with a profile for controlling text and background colours as well as font details. It also includes a version without GNOME dependencies that can be run as a small standalone window or swallowed into the panel of another window manager.
ZiK is an audio player based on gstreamer. It uses the path of your audio files instead of a music library. Audio files are shown on the left panel as they would be in a browser. The right panel is dedicated to the playlist. Both panels can be shown or hidden. ZiK uses your GTK theme. All formats supported by gstreamer, CDs, and webradios can played.