The package provides an alternative runtime using the Zero VM. Built on architectures in addition to the Hotspot VM as a debugging aid for those architectures which don't have a Hotspot VM.

GMT libraries allow manipulating geographic and Cartesian data sets (including filtering, trend fitting, gridding, projecting, etc.) and producing Encapsulated PostScript File (EPS) illustrations ranging from simple x-y plots via contour maps to artificially illuminated surfaces and 3-D perspective views.

GLib is a library containing many useful C routines for things such as trees, hashes, lists, and strings. It is a useful general-purpose C library used by projects such as GTK+, GIMP, and GNOME.

This is the GNU D compiler for the hppa-linux-gnu architecture, which compiles D on platforms supported by gcc. It uses the gcc backend to generate optimised code.

GLib is a low-level general-purpose library used mainly by GTK+/GNOME applications, but is useful for other programs as well. glibmm is the C++ wrapper for GLib.

GSound is a small library for playing system sounds. It's designed to be used via GObject Introspection, and is a thin wrapper around the libcanberra C library.