...
REPOX is a framework to manage metadata spaces developed in Java. It comprises several channels to import metadata from data providers, services to transform metadata between schemas according to user's specified rules, and services to expose the results to the exterior. REPOX aims to provide to all the TEL and Europeana partners a simple solution to import, convert and expose their bibliographic data via OAI-PMH. It was developed along EuropeanaConnect, Europeana Local, and Europeana Libraries projects. All code is available openly licensed (EUPL v.1.1) on GitHub. You can also find more information on the Original REPOX website or on the REPOX Wiki.
Ruby Libraries
Europeana Ruby Client Library
This is a Ruby client library for the search and retrieval of records from the Europeana Search API. The gem was developed as part of Europeana 1914-1918 and is also used in that application. All code is available openly licensed via GitHub or see the client library at Rubygems.
Node.JS Libraries
Node.JS module
...