CD-R/W discs can be written with a technique called packet or incremental writing. This allows transparent and buffer-underrun-free recording for CD recorders that support this method. No more mastering of .iso images; just mount your CD-ROM read/write and copy files directly to it.
Autoslack is designed to keep your Slackware Linux system up to date automatically. It reads a configuration file to get the FTP site you wish to use, the distribution directory to use, and where to store the packages on your system. It will show what's been updated based on what you have installed, what's new since you installed, and optionally download and install the packages.
SpiralLoops is a simple visual tool for looping, layering, and warping of sounds. Sounds can be input from either wav files on disk, or from sound generating plugins. You can create loop-based compositions with the minimum feedback time between the decisions you make and your ears. The looping mechanism is very flexible, allowing you to lock the timing of loops together or to offset them for creating complex sequences such as polyrhythms.
pygps is a GPS user interface. It shows a listing of satellites, their locations in the sky, a list of latitude, longitude, altitude, status, etc., and moving maps. It was designed to work on the Compaq (now HP) iPAQ PDA running Linux, with a 240x320 screen. However, it uses glade, so that it also works nicely on larger screens, or on a landscape orientation of 320x240. It works with any GPS receiver supported by gpsd (which see).