pygraph 2.32 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Pygraph for Mac lies within Developer Tools, more precisely Webmaster Tools. We recommend checking the downloaded files with any free antivirus. This free Mac application is an intellectual property of Bearophile.
From the developer:
pygraph is a Python library for a fast and flexible graph data structure. Pygraph aims to be an easy-to-use and functional graph library. By implementing the library in pure Python, it can be installed without any dependencies aside from the Python core.
You may want to check out more Mac applications, such as Pyware 3D, Music Writer Touch or Director's Viewer, which might be related to pygraph.