Social Network Visualizer (SocNetV) is a cross-platform, user-friendly application for the analysis and visualization of Social Networks in the form of mathematical graphs, where vertices depict actors/agents and edges represent their relations.
GraphThing is a tool that allows you to create, manipulate and study graphs. These "graphs" are mathematical objects that describe relationships between sets; they are not 2D plots, charts, or anything similar to that.
GraphShop is the Graph Theory Workshop, an interactive software environment for Graph Theory research and applications. It contains a visual "point and click" interface for graph creation and manipulations, as well as an integrated scripting environment (using...Discontinued
GitHub repo shows no maintenance, and author's website has been down for years.