Capuchin replaces NewStuffManager and comes with a completely rewritten D-Bus daemon, new D-Bus API and slightly changed XML file format. In addition, C GLib bindings are now available as well. From know on you only need a XML file that represents your repository.

Go and download the latest version here.

Examples in C# and Python are available at Subversion repository and in the tarballs. An example using the C GLib bindings is available in the tarballs, too.