Anjuta is a versatile Integrated Development Environment (IDE) for the GNOME desktop. It features a number of advanced programming facilities that include project management, application wizards, an on-board interactive debugger, an integrated glade UI designer, integrated devhelp API help, an integrated valgrind memory profiler, an integrated gprof performance profiler, a class generator, a powerful source editor, source browsing, and more.
Battstat is a battery status applet that monitors the battery charge level on a laptop. It displays different icons depending on the state of the power subsystem, and will warn if the power drops below a user configurable level. It uses the standard GNOME event system to play user configurable samples at certain events. It's available in binary form for Red Hat (.rpm), Debian (.deb) and FreeBSD (.tgz). You can also compile it yourself by downloading the source tarball (.tar.gz).
Beast is a powerful music composition and modular synthesis application. It offers multiple input methods like multitrack, piano roll, and pattern editing and supports skins. On the technical side, it has a wide range of abilities like sequencing, unlimited undo/redo history, real-time synthesis with multiprocessor support, full duplex 32-bit audio rendering, precise timing down to sample granularity, on demand loading of partial wave files, on the fly decoding of various sample formats, aliasing free oscillators, and full Scheme scripting support.