BMI is a tool to help dieting people. It calculates your Body Mass Index (BMI) and gives you an indication of your fatness. It saves the results in a file, so you can through the program look at the file, and compare your results from one day to another. This gives you an overlook of your weight development over a period of time.
ssh-keyinstall is a script that helps an ssh user set up the keys at both ends of an ssh connection. It creates an rsa or dsa key if needed and copies the public half to the server. Once the process is done, you'll be able to log in with the passphrase and key instead of a password.
rsync-backup automates the process of backing up multiple systems to one or more backup servers. It focuses on making the process secure. It encrypts the backup going across the wire, only ships changed data, runs the server as root to preserve permissions and ownership, keeps people from seeing each other's backups, and doesn't require the server to trust any files sent from the clients. It doesn't ship password files, key files, nor other sensitive files across the wire, but backs them up locally instead. Admins may use one key for everyone (backups named after the client IP) or allow named backups (when a machine may change IP or when multiple independant backups may need to be made from one machine).
HighPriest is a music jukebox system for Linux. It is geared towards high configurability of playback. If you want control over how one track crossfades into another, or you want to specify track start and end points, or you hate having to repeatedly adjust the volume knob, then this application may be for you. It also supports many usual features of software jukebox systems, such as custom playlists, random shuffling of tracks, the organization of songs according to category, etc. Although geared for a high level of tweakability, you may not feel like adjusting a bunch of playback parameters, so simply choosing many playback defaults will give you a nice, crossfading jukebox system.