Open3DALIGN may be downloaded from SourceForge as portable source code or as pre-built binary distribution for the following operating systems:
The binary distributions include:
dynamicmodules of TINKER, whose source code and documentation may be found at the TINKER website
When used interactively, Open3DALIGN may take advantage of PyMOL for real-time visualization of imported molecules. While PyMOL is not included in the Open3DALIGN distributions, install directions are given on this page.
Here you will find detailed instructions how to build Open3DALIGN from source on the different platforms, while here you will find out how to install the pre-built binary distribution which fits your OS/architecture.