libsoup is an HTTP client/server library. It uses GObjects and the glib main loop and integrates well with GNOME and GTK+ applications. Since it is based only on glib, it can also be used in command line and daemon-based applications. It features both asynchronous (GMainLoop and callback-based) and synchronous APIs, automatically cached connections, SSL support using GnuTLS, and proxy support including authentication and SSL tunneling. Client support includes Digest, NTLM, and basic authentication, and server support includes Digest and Basic authentication.
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.
libview is VMware's Incredibly Exciting Widgets, a collection of GTK+ widgets used within VMware products. These widgets are the same ones used in VMware Workstation 5.0 and higher, and were considered useful enough to open source so that others could use them in their own projects. These widgets are actively developed and maintained.
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.
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.