On this site we collect links, code and ideas about how we can visualise and navigate graphs.
In mathematics and computer science, Graph Theory is the study of graphs, which are mathematical structures used to model pairwise relations between objects.
A "graph" in this context is made up of vertices or nodes and lines called edges that connect them. A graph may be undirected, meaning that there is no distinction between the two vertices associated with each edge, or its edges may be directed from one vertex to another
There is a nice glossary of terms over on wikipedia 
Implementations