Geoeuropeana is a project mainly written in JAVASCRIPT and PYTHON, it's free.
A thin wrapper built on Pylons around the Europeana API to get GeoRSS results and a sample application. Put together at the first Europeana Hackaton.
Adrià Mercader - http://amercader.net
A thin wrapper around the Europeana API that transforms the results feed in a GeoRSS. It also includes a demo application that uses the geo wrapper to perform spatial queries.
It was built during the first Europeana Hackathon.
Interesting bits:
Wrapper: https://github.com/amercader/geoeuropeana/blob/master/geoeuropeana/controllers/wrapper.py
Demo app: https://github.com/amercader/geoeuropeana/tree/master/geoeuropeana/public
For more details, please have a look at this post: http://amercader.net/blog/2011/04/europeana-hackathon