PyMOL Molecular Graphics System Files

1 What is PyMOL?
PyMOL is an open-source molecular visualization system built on 
an open-source foundation. That means you get free access to 
source code--hence 'open source.' Schrodinger compiles and sells 
ready-to-run binaries for Windows, Mac, and Linux 
(http://pymol.org/buy).
2 Source Code
You can download the open-source code from github:
https://github.com/schrodinger/pymol-open-source
3 Legacy Builds
To support the PyMOL community, Schrodinger provides access to 
some PyMOL legacy builds at no-cost. Legacy builds are not supported,
in any way by Schrodinger: we simply provide them as a convenience
for our users.