rubrica is an address book written using GTK+ and GNOME. It allows you to add personal data (name, surname, address, etc.), Web links, email addresses, telephone numbers, job information (company where contact works, company infos, contact's assigment, etc.) and notes. XML is used to store the data. It can import addressbooks from GnomeCard and export to HTML.
The GNOME Structured File Library is a utility library for reading and writing structured file formats. Support for MS OLE2 streams is complete, as is zip import. There is also support for document metadata and some initial work on decompressing VBA streams in OLE files for future conversion to other languages. This library replaces libole2 and is used in gnumeric, mrproject, abiword, libwv2, koffice. It is also part of the AAF format.
GBonds is a savings bond inventory program for GNOME. It allows you to track the current redemption value and performance of your U.S. Savings Bonds and keep a valuable record of the bonds you own. Gbonds is similar in functionality to "Savings Bond Wizard" for Windows distributed by the U.S. Treasury.
Akeni LAN messenger is a cross-platform instant messenger client. It is a P2P program that works on your LAN without the need of an Internet connection or a dedicated server. The client has an user interface similar to AIM, ICQ, or MSN Messenger. It supports all the standard IM features such as chat, group conference, presence management, file transfer, and emergency alert/notification. Extra features include contact management and optional tabbed chat sessions.
ToutDoux is a project manager for GNOME. The approach of data manipulation is abstract (database free). It's extensible with plugins. Most tasks are and will be subcontracted with commandline frontends. The file format is XML (including a schema, plugins parameters, and datatables).