Python for AS/400 (OS/400)

http://www.iseriespython.com hosts an AS/400 port of Python 2.7, ported by Per Gummedal.

Python for BeOS

The latest version is available at BeBits. For all Python-related stuff on BeOS, search here.

Python for MorphOS

Guillaume ROGUEZ (aka Yomgui) maintains a Python port for MorphOS.

Python for MS-DOS

Python 2.4.2 for DOS/DPMI, built on the DJGPP platform, is also available.

Python for OS/2

Andrew MacIntyre maintains a port of Python 2.4.4 to OS/2.

Python for OS/390 and z/OS

http://www.teaser.fr/~jymengant/mvspython/mvsPythonPort.html has a ported version of Python 2.4.1.

Python for (what used to be Acorn) RISC OS

To build Python on RISC OS, look at RISCOS/README in the Python 2.x source tree. RISC OS support has been dropped from Python 3.x.

RISC OS binaries for Python 2.4.1 can be found at archive.org. This page also includes some pre-ported external libraries as well as RISC OS specific extensions and documentation, written by Dietmar Schwertberger.

Python for Series 60

Nokia has ported Python 2 to the Symbian OS-based Series 60 smartphone platform. There are downloads available at http://sourceforge.net/projects/pys60/.

Python for Solaris

You can purchase ActivePython (commercial and community versions, including scientific computing modules, not open source), or build from source if you have a C compiler.

Sunfreeware.com has a variety of Python versions for a variety of Solaris versions. These use the standard Sun pkgadd.

Python for VMS

A VMS port is available.

Python for Windows CE or Pocket PC

See the regular Python for Windows page.

Python for HP-UX

You can purchase ActivePython (commercial and community versions, including scientific computing modules, not open source)

Alternate Python packages for Linux

You can purchase ActivePython (commercial and community versions, including scientific computing modules, not open source)