bgs allows you to tailor the appearance of the background ("root") window on a workstation display running X. It uses imlib2 for image rendering and rotates the images automatically. It is designed for dynamic Xinerama/Xrandr setups such as those used with notebooks, but it works well in any setup.
PylotLight is a cross-platform, themeable, plugin-supporting system for general computing tasks. It is comparable to QuickSilver, which you may recognize if you use a Mac. Current plugins exist for Web searches, Firefox bookmark launching, filesystem browsing and managing, subversion control, terminal control, and more.
Barbarella is a user-configurable buttonbar intended to provide single-click access to applications and commands for simple Linux GUIs such as fluxbox. The content of each bar (icons, tooltips, and programs to be launched) is entirely determined by a configuration file with a simple syntax. Each line in the file defines one button. The default configuration file is $HOME/.barbarella.conf, but other files can be used, allowing users to have different buttonbars for different purposes.
Link Launcher is a GUI tool that helps you choose the Web browser in which to open a link. It is called whenever you follow a link from an application other than a Web browser, and it presents you with a choice of the available Web browsers, so that you can use the browser that is appropriate for that particular link.
xlax is an X11 input multiplexer: it sends your keyboard input from the xlax window to a group of windows simultaneously. The tool is designed for system administrators who typically have to do the same thing on several machines (or in several different directories). Windows can be added or deleted interactively, or temporarily disconnected and reconnected. xlax allows you to assign a custom string to each window (e.g. a hostname) that can be sent with a button click. An included script handles starting up and arranging windows, and allows you to set up commonly used window groupings in a config file.
Logsmith is an extendable framework for processing and editing small text files. It can be seen as a combined (but stripped down) version of UN*X tools like awk, sed, and grep with a graphical user interface. The intent is to give users the powers such tools provide without having to train them in their use. In order to archive this goal, logsmith can easily be customized through a plugin architecture to perform the commons tasks that a specific user base might require.
Phuzby will let you search your organisation's LDAP directory (such as Active Diretory, Novell eDirectory, or OpenLDAP) for the contact details of colleagues, customers, or suppliers. Phuzby can display a photo for each person, and can even read the telephone number out loud to help you dial it correctly. In fact, if your phone system supports TDMF tones, you can hold your handset near you PC's speaker and phuzby will dial the number for you.