Gringotts is a small utility that allows you to jot down sensitive data (passwords, PINs, small files, etc.) in an easy-to-read, easy-to-access, and most of all very secure form. It lets the user choose from among eight strong encryption algorithms (RIJNDAEL-128, RIJNDAEL-256, SERPENT, TWOFISH, CAST-256, SAFER+, LOKI97, 3DES), two hashing algorithms (SHA1, RIPEMD 160), and two compression techniques (ZLib and BZip2) with four compression ratios. It allows the user to use any file or an entire floppy disk as a password, as an alternative to the usual text string.
Alleyoop is a GNOME frontend to the Valgrind memory checker. Its features include a right-click context menu to intelligently suppress errors or launch an editor on the source file, jumping to the exact line of the error condition. A searchbar at the top of the viewer can be used to limit the viewable errors to those that match the regex criteria entered. A fully functional Suppressions editor is also included.
Pybliographer is a tool for managing bibliographic databases. It supports several bibliography formats (BibTeX, Refer, Medline, ISI, Ovid) and can be used for searching, editing, reformatting, etc, through its nice graphical interface for GNOME. Due to its nature, it can be extended to many uses (generating HTML pages according to bibliographic searches, etc). It is provided with sample scripts.
BlueProximity helps add a little more security to the desktop. It does so by detecting a certain Bluetooth device, most likely a mobile phone, and keeping track of its distance. If it is moved away from the computer and the distance is above a certain level (no measurement in meters is possible) for a given time, it automatically locks the desktop (or starts any other shell command wanted). Once away, the computer awaits its master's return: if the device is nearer than a given level for a set time, the computer unlocks without any interaction (or starts any other shell command wanted).