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.
GTK ADI Library is a library containing GTK ADI widgets. ADI stands from Advanced Document Interface, and is an MDI (Multiple Document Interface) implementation. It contains a common MDI interface widget and several MDI representations (views). There are currently two views available: a "classical for GTK" tabbed MDI view, and an aligned MDI view. The aligned MDI view can have all child windows visible on the same parent screen, but without wasted space between them as can usually happen when a traditional MDI widget is used. Further development will include a window MDI view, where all the child windows are represented by the standard GTK windows or dialogs.
The goal of the General Applet Interface Library is to give programmers a simple yet powerful applet interface. This library supports wmapplet/dockapps, GNOME 2 panel applets, and ROX panel applets. The applet programmer doesn't have to care about where the applet will be used, since the library handles that. Over 50% of the code in a dockapp and a GNOME 2 Panel applet does only one thing, setting up the applet window. With GAI, this can be reduced to just a few lines of code.
Glib Binding properties is a system that allows developers to bind properties of GLib and GTK+ objects (Ada95 bindings are also available). This makes it possible to synchronize the properties of several objects, so that when one property changes the properties bound with it automatically change accordingly. This often eliminates the need to write callbacks watching for changes of properties. It supports one-way and mutual bindings and bindings with transformation functions.
Gnome-GCJ is a set of GTK+ and GNOME bindings for Java. It compiles with the GCJ compiler (part of egcs) and uses the GCJ runtime library libgcj. GCJ is capable of compiling Java source code to native machine code, which makes Java code almost as fast as C++ code. As the interface between Java and GTK+, CNI (Cygnus Native Interface) and C++ will be used instead of the more traditional JNI and C. This means that support for other Java runtimes has been sacrificed in favour of GCJ and its faster CNI.
GrypPhon focuses on adding new features to the old concept of a CD player, while maintaining extreme configurability. It is written purely in Python and contains a Linux CD-ROM audio library for Python containing all normal CD-playing features, plus volume control and skipping/searching.