Vala is a programming language that aims to bring modern programming language features to GNOME developers without imposing any additional runtime requirements and without using a different ABI compared to applications and libraries written in C.

libchamplain is a C library providing a ClutterActor to display maps. It also provides a Gtk+ widget to display maps in Gtk+ applications.

Evince is a document viewer for multiple document formats. The goal of evince is to replace the multiple document viewers that exist on the GNOME Desktop with a single simple application.