Workbench is for learning and prototyping with GNOME technologies, no matter if tinkering for the first time or building and testing a GTK user interface.

Among other things, Workbench comes with
<ul><li>Live GTK/CSS preview</li><li>Library of 100+ examples</li><li>JavaScript, Rust, Python and Vala support</li><li>Declarative user interface syntax</li><li>Autosave, sessions and projects</li><li>Code diagnostics, completion and formatter</li><li>Terminal output</li></ul>