Kenelyze is described as 'online social network analysnd visualization tool allowing users to view their connected data from a whole new angle'. There are six alternatives to Kenelyze for a variety of platforms, including Mac, Windows, Linux, Online / Web-based and BSD. The best alternative is yEd Graph Editor, which is free. Other great apps like Kenelyze are Graphviz (Free, Open Source), Gephi (Free, Open Source), Cytoscape (Free, Open Source) and Tulip (Free, Open Source).
Graphviz is open source graph visualization software. It has several main graph layout programs. It also has web and interactive graphical interfaces, and auxiliary tools, libraries, and language bindings.
Cytoscape is an open source software platform for visualizing complex networks and integrating these with any type of attribute data. A lot of plugins are available for various kinds of problem domains, including bioinformatics, social network analysis, and semantic web.