The latest version of WebKitGTK+ can be downloaded from Softpedia
WebKitGTK+, a version of the WebKit open source web engine that uses GTK+ as its user-facing frontend, is now at version 2.2.0.WebKitGTK+ is out and includes both the WebKit1 and WebKit2 APIs by default. As for the WebKit1 API, it's now in maintenance mode and the developers will continue to fix any bugs.
Check out the official announcement for a complete list of changes and updates. Users who intend to compile WebKitGTK+ have to keep in mind that it has a lot of dependencies.
Download WebKitGTK+ 2.2.0 right now from Softpedia.