Some of the old software before 2010 may not be able to install/run normally on x64 or Windows 10 systems. Be aware of it before purchasing it.
Microsoft Automatic Graph Layout (MSAGL) is a .NET tool for laying out and visualizing directed graphs. You can use MSAGL to represent complex directed graphs, such as those found in business management, manufacturing, and network analysis, as well as phylogenetic trees, which are used in bioinformatics research.
http://research.microsoft.com/en-us/projects/msagl/