pip install pprocess==0.5.1

Elementary parallel programming for Python

Source
Among fairly niche packages on PyPI.
Over 447 downloads in the last 90 days.

Commonly used with pprocess

Based on how often these packages appear together in public requirements.txt files on GitHub.

pymvpa2

Multivariate pattern analysis

python-qprogedit

A QScintilla-based text-editor component

libleipzig

wortschatz.uni-leipzig.de binding

pyo

Python module to build digital signal processing program.

expyriment

A Python library for cognitive and neuroscientific experiments

pyparallel

Python Parallel Port Extension

rubber

Elasticsearch client with Django support.

apsw

Another Python SQLite Wrapper

PsychoPy

Psychology experiment software in Python

openopt

A python module for numerical optimization

wxPython

Cross platform GUI toolkit for Python, "Phoenix" version

configglue

Glue to stick OptionParser and ConfigParser together

pygpgme

A Python module for working with OpenPGP messages

uTidylib

Wrapper for HTML Tidy at http://tidy.sourceforge.net

pycups

Python bindings for libcups

pysmbc

Python bindings for libsmbclient

duplicity

Encrypted backup using rsync algorithm

piston-mini-client

A package to consume Django-Piston web services

defer

Simple framework for asynchronous programming

Version usage of pprocess

Proportion of downloaded versions in the last 3 months (only versions over 1%).

0.5.1

40.04%

0.5

17.23%

0.4

16.33%

0.3.1

13.65%

0.3

12.75%