A nice graphical application launcher, it displays icons around the mouse with transparency. [Open source, GPL]

Free multithreaded ftp client for *NIX based machines running X11R6 or later.

Single process stack of system monitors which supports applying themes to match its appearance to your window manager, Gtk, or any other theme.

Archive of Glade developer message list.

A Newt compatible gtk+ based library. [Open source, LGPL]

GTK-based CD player and ripper for Linux; with an internal encoder.

A Microsoft's Explorer like tool for browsing and manipulating folders, files, devices and (in future) different networks.

List of GTK applications.

A GTK+ and GNOME book online which is also available for purchase.

Tutorial on how to use GTK (the GIMP Toolkit) through its C interface.

A GUI Builder based on GtkArgs instead of having to create a wrapper for each widget it supports. [Open source, LGPL]

GTK+ reference documentation.

A program to quickly create a new Gtk Object/Widget.

Library to build graphical user interfaces (GUIs) originally for X Window. Designed to be small, efficient, flexible. Coded in C, in very object-oriented style. Language bindings: C++, Perl, Python, Objective-C, Guile. [Open Source, LGPL]

Simple and useful alarm that will execute a system command at any time of day.

A source code editor widget for GTK+. It is currently used, in one version or another, in several GTK+/GNOME applications, including gIDE, VDKBuilder, GXEdit, and Bluefish. [Open source, LGPL]

A useful set of widgets for creating GUI's for the Xwindows system using GTK+.

Provides C++ wrappers for GtkExtra, for use with Gtk--. This includes the GtkPlot and GtkSheet widgets, among others.

A gtk+ container widget similar to the Motif XmForWidget. [Open source]

GTK sound tracker module player.

A GTK2 widget server. (Python, Ruby, GTK2) [Open source, OS Independent]

This library implements a full callback system for use in widget libraries, abstract interfaces, and general programming. It is a complete library with the ability to connect an abstract callback to a class method, function, or function object.

Automated GUI installer and setup utility for the X Window System.

Formerly GtkTiLink, provides GtkDll and GtkHeader-Installation packages for Windows.

Rapid application development tool based on VDK (The Visual Development Kit), a C++ wrapper of the outstanding Gtk+ widget set library. [Open source, GPL]

Win32 ports of GTK, Glade, Libglade, gtkextra, GWF. Visual automatic code generator and complete Windows programming environment. Uses Tors libraries for the packages.

A C library allowing to create GTK based GUI with not a single bit of memory per widget.