django-treenode is probably the best abstract model / admin for your tree based stuff.
django-maintenance-mode shows a 503 error page when maintenance-mode is on.
python-codicefiscale is a tiny library for encode/decode Italian fiscal code - codifica/decodifica del Codice Fiscale.
django-navsy is a fast navigation system for lazy devs.
django-admin-interface is a modern responsive flat admin interface customizable by the admin itself.
django-freeze converts your django site to a static one with one line of code
A small app providing a colorpicker field for django
django-kway is an alternative to django gettext catalog with admin integration.