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.
drun is a GTK run dialog box with tab completion and a simple UI. It supports common features as well as history, files, directories, URLs, and spelling correction. It was designed to be simple and fast, and be easy to use with keyboard input. It can be run with directory and file parameters to support integration with Nautilus and Thunar selections. It keeps a history of run commands to give ordered completions including parameters. It has configurable URL and directory handlers, and recursive tab completion.