I have been looking at MIT's ConceptNet 5.2. It is intended to do some of the things I was doing with my associative/semantic networks (Trans. Kan. Acad. Sci., vol. 102, pg 32, 1999). My network ran very slowly (in PROLOG) when the number of associations (the database) reached about 3000.
(In some PROLOG interpreters it crashed.) Several times I have thought of rewriting the program in another language to speed it up but I've not spent the time needed to do it.
ConceptNet was given some verbal IQ tests and came out about equal to a human 4 year old.