UCINET - UCINET for Windows is a software package for the analysis of social network data.
Pajek - Pajek is a lightweight solution developed from scratch by an extraordinary team of developers for the purpose of Large Network Analysis.
Gephi - Gephi is an open-source software for visualizing and analyzing large networks graphs.
SocNetV - Social Network Visualizer (SocNetV) is a cross-platform, user-friendly free software application for social network analysis and...
Graphviz - Graphviz is open source graph visualization software. It has several main graph layout programs.
Network Weathermap - Network Weathermap is a robust and open-source network visualization solution that enables you to use network statistics for creating live network maps.