Microsoft NodeXL Excel Template 1.0Free
NodeXL is a template for Excel 2007 and 2010 that lets you enter a network edge list, click a button, and see the network graph, all in the Excel window. It allows you to customize the graph’s appearance, zoom, scale and pan the graph, filter vertices and edges, alter the graph’s layout, find clusters of related vertices, calculate a set of graph metrics.
Networks can be imported from and exported to a variety of data formats. NodeXL can also connect directly to the Twitter, Flickr, and YouTube Web sites, letting you import the network of people who have recently tweeted.