SNAC's a Neat Algebraic Calculator for the GNOME desktop, designed to be easy to use, illustrative, and more friendly than an arithmetic calculator. SNAC can perform simple numeric algebraic operations, returning the result with different formating as well as various angle measures.
Screen-shooter is a Gnome applet which sits on your panel and allows you to take screenshots at the click of a button. By acting as a frontend to the import program supplied by ImageMagick, it uses the power therein to provide support for a gazillion file-types with adjustable compression. Two buttons are provided, one for an entire desktop screenshot, and one for selecting individual windows or dragging to select rectangular areas. It also supports command substitution in filenames (for date stamps, etc) and has a number of further options. Screen-shooter is still under development, but version 0.8.2 is believed to be stable.
remotehost_applet helps to administrate your remote hosts. You specify the host's address, your login name, and a network protocol, and with additional information about the remote host's operation system a panel icon is created and linked with useful commands. A click on that icon will connect you to the machine, and the context menu offers commands like ping and traceroute. It supports telnet, rsh, ssh, and Virtual Network Computing (VNC).
pasmon is a graphical passive network monitor. It provides statistics on every host and TCP connection heard on the specified interface[s], probes the system to find valid devices and provides a toolbar button which activates monitoring each device. Currently stable, but with missing features.