ActivePython from ActiveState is a commercial-grade, quality-assured Python distribution focusing on easy installion and cross-platform compatibility Windows, Linux, Mac OS X, Solaris, HP-UX and AIX. It includes a precompiled Python distribution for out-of-the-box installation, core Python binaries, and additional binaries for popular packages through Python Package Manager (PyPM). Available in Business, Enterprise, OEM, and Community Edition, you can start with a free download of ActivePython Community Edition here . In addition, ActiveState provides a PyPM Index , to save time in searching and reviewing details of additional Python packages.
ActiveState is one of the most well known and one of the longest running suppliers of Python distributions, tools, and support.