django-filebrowser for default Django admin site. Based on https://github.com/sehmaschine/django-filebrowser v3.1 (before it was in git) Consider using https://github.com/smacker/django-filebrowser-no-grappelli which is based on a newer version
This fork works with Django 1.8 by conditionally importing simplejson based on the pythong version.