Smuxi is an irssi-inspired, flexible, user-friendly, and cross-platform IRC client for sophisticated users. Smuxi is based on the client-server model: The core application (engine) can be placed onto a server which is connected to the Internet around-the-clock; one or more frontends then connect to the core. This allows the connection to IRC to be kept up even when all frontends have been closed. The combination of screen and irssi served as the example for this architecture. Smuxi also supports the regular single application mode. This behaves like a typical IRC client; it doesn't need separate core management and utilizes a local engine that is used by the local frontend client.
Desktop Data Manager is a clipboard manager for GNOME similar to Klipper for KDE. With DDM, it is possible to display different types of content like text or images. Additionally, DDM includes a screenshot taking application which is able to take screenshots of a single window or subwindow, a rectangle of the screen, or the whole desktop.
Spam Trainer makes it easier for GNOME users to train spam filtering software (e.g. SpamBayes or SpamAssassin) that "learns" how to tell the difference between real email (ham) and unsolicited messages (spam). Not all email clients have spam filtering (and training) built in, and training external filtering programs can be fiddly. Spam Trainer provides easy (drag and drop) training from the Evolution mail client, and should work just as well with any email client that supports the drag and drop protocol implemented by the GTK+ toolkit.
GNOME Word of the Day is a GNOME applet that displays a new vocabulary word each day. No one likes to be lost in a sea of unknown words. With this applet, your vocabulary will evince perennial growth. It's a must when preparing for the SAT or GRE tests and for improving both reading comprehension and writing precision. It sits in the panel as a whole word or as a small icon. You can retrieve words from a selection of online sources and automatically cycle to a new source every few hours.