Exploratory Social Network Analysis with Pajek
de Nooy, W.; Mrvar, A. & Batagelj, V.
2005, Structural Analysis in the Social Sciences, Cambridge University Press, New York, NY, USA [pdf]
Graphviz and Dynagraph -- Static and Dynamic Graph Drawing Tools
Ellson, J.; Gansner, E.; Koutsofios, E.; North, S. & Woodhull, G.
Junger, M. & Mutzel, P., ed., 'Graph Drawing Software', Springer-Verlag, Berlin/Heidelberg, 127-148 (2004) [pdf]
Graphviz is a heterogeneous collection of graph drawing tools containing batch layout programs (dot, neato, fdp, twopi); a platform for incremental layout (dynagraph); customizable graph editors (dotty, grappa); a server for including graphs in Web pages (webDOT); support for graphs as COM objects (montage); utility programs useful in graph visualization; and libraries for attributed graphs. The software is available under an Open Source license.