What is GTK+, and how can I use it?

GTK+, or the GIMP Toolkit, is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK+ is suitable for projects ranging from small one-off tools to complete application suites.

Where can I use it?
Everywhere! GTK+ is cross-platform and boasts an easy to use API, speeding up your development time. Take a look at the screenshots to see a number of platforms GTK+ will run.
What languages are supported?
GTK+ is written in C but has been designed from the ground up to support a wide range of languages, not only C/C++. Using GTK+ from languages such as Perl and Python (especially in combination with the Glade GUI builder) provides an effective method of rapid application development.
Are there any licensing restrictions?
GTK+ is free software and part of the GNU Project. However, the licensing terms for GTK+, the GNU LGPL, allow it to be used by all developers, including those developing proprietary software, without any license fees or royalties.

Get an overview of GTK+. Understand who started it, the basic architecture and why we use the license we do.

GTK+ has been involved in many projects and some big platforms. To get a glimpse of what people think of GTK+ and how it has been used in commercial projects, read the success stories...

To find out how more about what GTK+ can do for you, visit our features page. If you want to contribute, you are more than welcome.