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Overviews and Reviews

Here's a nice overview of software packages, many of which are listed below.

Reviews of SNA packages

Network analysis

Keyplayer, for identifying key nodes

DNA, for discourse analysis

Siena

Kumu

FNA

Graph Commons: simple and beautiful interface for collaborative network-building, with some basic network algorithms built in - you can also import/export data; check it out.

gephi: very popular tool for network science. Gephi tutorials

NodeXL another popular tool that works in conjunction with Excel (mainly Windows - but there are solutions for mac too)

Ucinet: one of the standard SNA packages, along with Pajek.

SocNetV: easy to use, but a bit buggy last I checked. Will run a "spider" mapping a portion of the web.

NetworkX: a Python package for network analysis (requires programming)

Network Analysis and Visualization with R and igraph (requires programming). Another R package is here

igraph or igraph, an open source C (programming language) library for the analysis of large-scale complex networks, with interfaces to R (programming language), Python and Ruby

Tools at Carnegie Mellon's Center for Computational Analysis of Social and Organizational Systems (CASOS)

ORA, a tool for Dynamic Network Analysis and network visualization. Kathleen M. Carley, 2014, ORA: A Toolkit for Dynamic Network Analysis and Visualization, In Reda Alhajj and Jon Rokne (Eds.) Encyclopedia of Social Network Analysis and Mining, Springer.

Orange, a free data mining software suite, module orngNetwork

Meerkat: developed by our own CS folks; runs in Java

Tulip, a free data mining and visualization software dedicated to the analysis and visualization of relational data. [1]

SEMOSS, an RDF-based open source context-aware analytics tool written in Java, leveraging the SPARQL

webweb, to display interactive networks in a browser.

Visviewer, specifically for visualizing citation networks (who cited whom)

And many others...