If you want to add tiny snippets of text to your site, manageable by the admin backend, you would use either django-chunks or django-flatblocks. However, both of them have one problem: you are limited to a predefined content field; a "text" field in chunks and a "title" and "text" field in flatblocks.
django-generic-flatblocks solves this problem as it knows nothing about the content itself. You attach your hand made content node (a simple model) where you can define any fields you want.
Documenation is available online under:
http://readthedocs.org/docs/django-generic-flatblocks/en/latest/