Gtk is a GUI library used for software development. It provides a set of tools for creating graphical user interfaces for applications.
GTK is built on three libraries created by the GTK team: GLib, Pango, and ATK. GLib serves as the foundational core library for GTK and GNOME. It provides essential functions like data structure handling for C, portability wrappers, and interfaces for runtime functionality like threads, dynamic loading, event loops, and object systems. On the other hand, Pango is the core library for text and font handling in GTK and emphasizes internationalization. Lastly, ATK library provides a set of interfaces for accessibility so that applications can be used with alternative input devices and tools like magnifiers and screen readers.
GTK has been optimized to support a variety of programming languages beyond C/C++. This means that developers can use languages such as Python and Perl in conjunction with the Glade GUI builder to improve software development speed. In summary, GTK is a highly versatile and easy-to-use toolkit that enables software developers to create and build applications with clean interfaces, supporting the development of robust software projects for various platforms.