nosql

CouchDB: The Definitive Guide. Oh, the CouchDB book by O'Reilly is also available as an online book and even in German. Certainly interesting for one or the other who doesn't feel like wading through English books. The translation is not (yet?) complete, so you will still come across English chapters. But it's a start.

Bulbflow: a New Python Framework for Graph Databases. Even though I keep thinking that graph databases are so 70s, not everything old is automatically bad - IMS is still around and very interesting for some purposes. And this sounds interesting, something like DBAPI for graph databases, so that you can change the database in your projects without having to rewrite everything completely.

CouchDB: The Definitive Guide. And since it fits so well, here is the link to a book on CouchDB for online reading. It is also available online in German (and of course in English. And also in French). However, the German version seems to be incomplete - you keep encountering English pages.

micromongo — micromongo v0.1 documentation. Also check out micromongo, it provides a minimal ORM for MongoDB servers. However, I would have to check if django-nosql already supports MongoDB by now, then I wouldn't have to use a different ORM syntax - although micromongo is really quite lean and is based only on pymongo, so for example nice for small web services, because you don't have to install a bunch of modules.

NOSQL Databases. Excellent overview of all available NoSQL databases. Good starting point if you want to inform yourself about the available systems and their orientation and implementation.