ArangoDB in an hybrid db that can do graphs. Easy to install and use, quite reliable - we use it in production.<p><a href="https:&#x2F;&#x2F;www.arangodb.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.arangodb.com&#x2F;</a> (just a happy user)<p>Also: <a href="https:&#x2F;&#x2F;github.com&#x2F;google&#x2F;cayley" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;google&#x2F;cayley</a>