The YALTools is a set of command line tools written in ruby for CouchDB. It provides a unix like command set, mkdb, rmdb, lsdbs, lsdocs, putdocs, csv2json, and more. It aims to provide a power of filters and pipes in *NIX environment.
Redland is a set of object-based, modular and portable C RDF libraries providing RDF APIs for the graph, triple storage (librdf), RDF/XML parsing and serializing (Raptor), SPARQL RDF querying (Rasqal). Language APIs in Perl, PHP, Python, Ruby and others.