The latest version of GTK+ can be downloaded from Softpedia
GTK+, a multi-platform toolkit for creating graphical user interfaces that provide a complete set of widgets, suitable for projects ranging from small one-off tools to complete application suites, is now at version 3.9.1.According to the developers, GTK+ 3.9.1 incorporates new features and quite a few updates. This is now a development version and is part of the GNOME 3.9.x package.
Highlights of GTK+ 3.9.1:
• fuse-mounted locations are always shown in shortcuts;
• The GtkFileChooserButton has been receiving a lot of fixes;
• Initial support for client-side decorations has been added;
• Wayland optimizations have been implemented.
A complete changelog, featuring all the updates and fixes, can be found in the official announcement.
Download GTK+ 3.9.1 right now from Softpedia. Remember that this is a beta version and it should NOT be installed on production machines. It is intended for testing purposes only.