Promoting our own site: http://www.theeuropeanlibrary.org We are aggregating bibliographic records from 48 European national libraries, major research libraries and some other free sources. We also feature some special exhibitions, full text content and some federated search for those collections that cannot be harvested. It is a complete in-house development,Java/Solr based, from aggregation and processing framework to frontend, using Apache Wicket. Regards, Rene Wiermer