Knowledge graph toolkit

Dear all,

I´ve notice in the last time the appearance of knowledge graph as a keyword in the Semantic Web context. As I am from the old school, some programming technologies that I am managing are a little out of date. 

I would like to ask if some of you could recommend a basic toolkit for a knowledge graph phd student. This includes from programming languages to frameworks, tools, and any other important tool. For example, where could use to store or manage a knowledge graph (neo4j was the last I ve seen, imagine there are new alternativas, most of them open source).

Thanks in advance,

Diego





Dr. Diego Torres
Centro de Investigación LIFIA 
Facultad de Informática - UNLP
diego.torres[at]lifia.info.unlp.edu.ar
http://www.lifia.info.unlp.edu.ar/lifia/en/files/diego-torres/
Director de http://cientopolis.org