- Bandit Bandit is a tool designed to find common security issues in Python code.
- Black The uncompromising Python code formatter
- sentry-python The new Python SDK for Sentry.io
- Tensorflow An Open Source Machine Learning Framework for Everyone
- Celery Distributed Task Queue (development branch)
- gevent Coroutine-based concurrency library for Python
- psycopg2 PostgreSQL database adapter for the Python programming language
- pre-commit A framework for managing and maintaining multi-language pre-commit hooks.
- Pillow The friendly PIL fork (Python Imaging Library)
- NumPy The fundamental package for scientific computing with Python.
- SciPy Scipy library main repository
- pytest The pytest framework makes it easy to write small tests, yet scales to support complex functional testing
- pytest-django A Django plugin for pytest.
- pytest-freezegun Easily freeze time in pytest test + fixtures
- pytest-mock Thin-wrapper around the mock package for easier use with py.test
- Coverage.py Code coverage measurement for Python
- freezegun Let your Python tests travel through time
- mock The Python mock library
- Django The Web framework for perfectionists with deadlines.
- Django REST framework Web APIs for Django.
- Django Debug Toolbar A configurable set of panels that display various debug information about the current request/response.
- Flask The Python micro framework for building web applications.
- gunicorn gunicorn 'Green Unicorn' is a WSGI HTTP Server for UNIX, fast clients and sleepy applications.
- werkzeug The comprehensive WSGI web application library.
- python-socketio Python Socket.IO server and client
https://github.com/vinta/awesome-python is a popular iteration of this idea.