Netbase the Knowledge Graph of World Data, containing over 600000000 entities and statements from all the internet's finest sources, including Freebase, WikiData, DBPedia, Yago, Wordnet, babelnet, ... )
Browse our Knowledge Graph, run locally or host as your own graph database, it is very quick to load.
From simple entities to complex queries, this is by far the fastest db of its kind. You can start experimenting with the API in Python, Ruby, Java (alpha) and Node.js,
git clone https://github.com/pannous/netbase
cd netbase
./netbase :helpAfter you have imported some data (see ./import/ folder),
start the server via ./netbase :server
https://en.wikipedia.org/wiki/List_of_lists_of_lists
Netbase is much more than a hyperfast triple store: It is a semantic inference system which has the wordnet ontology built-in. Semantic relations are the back-bone of netbase, so that you can quickly query with synonyms, transitive class hierarchies, part meronyms etc.
Instead of asking about the "names of the daughters of Barack Obama" you could just search for "Obamas kids".
Extremely fast data import is provided for all common graph/data formats including n3, rdf, owl, csv, mysql, sql and xml; The same formats are available for data access and data export together with the blueprints standard.
This database is already used by millions of users through the Genie/Voice Actions app.