You may want to work with the RapidMiner and the following extension: http://www.e-lico.eu/recommender-extension.html

Dear Abba.

Apart from the excellent RapidMiner extension, and depending on your definition of "framework", here are some more links:

* Librec is a library with several algorithms for recommending implemented (Java)

* myMediaList is another library with algorithms (C-sharp).

* EasyRec is more of an application, also supports the storage aspect.

http://librec.net/

http://mymedialite.net/index.html

http://easyrec.org/

This should be case by case. The main factor which may effect the framework is the scale of the system. The framework for a system with the user number of 10000 or 1 billion must be different.