GStreamer is a streaming media framework that allows the construction of graphs of elements which operate on media data. Applications using this library can do anything from real-time sound processing over playing video to capturing audio, video, and even other types of media data. Its architecture allows for adding new data types or processing capabilities simply by installing new plug-ins. GStreamer is the core module, containing libraries, headers, the basic object hierarchy, and a set of media-agnostic core elements.
GTK, which stands for the Gimp ToolKit, is a library for creating graphical user interfaces. It is designed to be small and efficient, but still flexible enough to allow the programmer freedom in the interfaces created. GTK provides some unique features over standard widget libraries.
gtkmm (previously known as Gtk--) is a C++ interface for the popular GUI library GTK+. It provides a convenient interface for C++ programmers to create graphical user interfaces with GTK+'s framework. Highlights include typesafe callbacks, widgets which are extensible by inheritance, and many classes that can be easily combined to quickly create complex user interfaces.
GtkCanvas is a straight port of the GNOME Canvas from the stable gnome-libs 1.2.4 back to gtk+. This widget behaves identically to the GnomeCanvas widget, with the same APIs, except the names are changed from gnome_canvas to gtk_canvas. Since the next version of gtk+ will drop GdkImLib and intgrate with gdk-pixbuf, it is expected that future versions of this widget will depend upon gtk+ only. It is intended that GtkCanvas will follow GnomeCanvas closely, merging new code whenever a stable release of the latter is made. Thus this is not really a fork but rather a "re-packaging" of the same code.
GtkDatabox is a widget for the GTK+ library designed to display large amounts of numerical data quickly and easily. It allows for one or more data sets of thousands of data points (X and Y coordinates) to be displayed and updated in split seconds. It offers the ability to zoom into and out of the data, and to navigate through your data by scrolling. In addition to rulers and a simple coordinate cross, it allows you to add one (or even more) configurable grids like on an oscilloscope. Data may be presented as dots, lines connecting the data, or vertical bars. The widget allows you to easily transform pixel coordinates into data coordinates, thus allowing you to easily create powerful applications for data analysis.
GtkEditor is a source code editor widget for GTK+. It is currently used, in one version or another, in several GTK+/GNOME applications, including gIDE, VDKBuilder, and GXEdit. The gtkeditor widget sub-classes the gtktext widget, and after initialization, the editor widget can be treated as the usual text widget, and all source-code editing features are taken care of by the widget itself. The behaviour of the editor is decided by dynamic libraries loaded during initialization of the widget. These libraries can be hand-coded or (in the future) created using tools supplied with GtkEditor.