With Catmandu, LibreCat tools abstract digital library and research services as data warehouse processes. As stores we reuse MongoDB or ElasticSearch providing us with developer friendly APIs. Catmandu works with international library standards such as MARC, MODS and Dublin Core, protocols such as OAI-PMH, SRU and open repositories such as DSpace and Fedora. And, of course, we speak the evolving Semantic Web. Follow us on http://librecat.org and read an introduction into Catmandu data processing at https://github.com/LibreCat/Catmandu/wiki.