This is an old revision of the document!
Translate the source code of Xfce.
How to start writing or translate the application manuals on this website.
How to contribute code and becoming a developer.
Additionally, Xfce uses the GTK+/Glib family of libraries which can be found at the following:
Tutorials for getting started with GTK+ are available at:
If you're looking at writing a panel plugin, you may want to look at the xfce4-sample-plugin for an easy start.