Admin Panels

• django-grappelli - A jazzy skin for the Django Admin-Interface.
• django-suit - Alternative Django Admin-Interface (free only for Non-commercial use).
• ajenti - The admin panel your servers deserve.
• django-jet - Modern responsive template for the Django admin interface with improved functionality.
• django-xadmin - Drop-in replacement of Django admin comes with lots of goodies.
• flower - Real-time monitor and web admin for Celery.
• wooey - A Django app which creates automatic web UIs for Python scripts.
• flask-admin - Simple and extensible administrative interface framework for Flask.

Algorithms and Design Patterns

• algorithms - Minimal examples of data structures and algorithms in Python.
• PyPattyrn - A simple yet effective library for implementing common design patterns.
• python-patterns - A collection of design patterns in Python.
• sortedcontainers - Fast, pure-Python implementation of SortedList, SortedDict, and SortedSet types.

Audio

• audioread - Cross-library (GStreamer + Core Audio + MAD + FFmpeg) audio decoding.
• dejavu - Audio fingerprinting and recognition.
• mingus - An advanced music theory and notation package with MIDI file and playback support.
• pyAudioAnalysis - Audio feature extraction, classification, segmentation and applications.
• pydub - Manipulate audio with a simple and easy high level interface.
• TimeSide - Open web audio processing framework.
• beets - A music library manager and MusicBrainz tagger.
• eyeD3 - A tool for working with audio files, specifically MP3 files containing ID3 metadata.
• mutagen - A Python module to handle audio metadata.
• tinytag - A library for reading music meta data of MP3, OGG, FLAC and Wave files.

Authentication

• authlib - JavaScript Object Signing and Encryption draft implementation.
• django-allauth - Authentication app for Django that "just works."
• python-oauth2 - A fully tested, abstract interface to creating OAuth clients and servers.
• python-social-auth - An easy-to-setup social authentication mechanism.
• pyjwt - JSON Web Token implementation in Python.
• python-jwt - A module for generating and verifying JSON Web Tokens.
• python-jose - A JOSE implementation in Python.
• django-oauth-toolkit - OAuth 2 goodies for Django.

Build Tools

• buildout - A build system for creating, assembling and deploying applications from multiple parts.
• buildout - A build system for creating, assembling and deploying applications from multiple parts.
• PlatformIO - A console tool to build code with different development platforms.
• pybuilder - A continuous build tool written in pure Python.
• SCons - A software construction tool.
• BitBake - A make-like build tool for embedded Linux.

Built-in Classes Enhancement

• dataclasses - (Python standard library) Data classes.
• attrs - Replacement for __init__, __eq__, __repr__, etc. boilerplate in class definitions.
• bidict - Efficient, Pythonic bidirectional map data structures and related functionality..
• Box - Python dictionaries with advanced dot notation access.
• DottedDict - A library that provides a method of accessing lists and dicts with a dotted path notation.

Caching

• HermesCache - Python caching library with tag-based invalidation and dogpile effect prevention.
• beaker - A WSGI middleware for sessions and caching.
• django-cache-machine - Automatic caching and invalidation for Django models.
• django-cacheops - A slick ORM cache with automatic granular event-driven invalidation.
• pylibmc - A Python wrapper around the libmemcached interface.
• HermesCache - Python caching library with tag-based invalidation and dogpile effect prevention.
• dogpile.cache - dogpile.cache is next generation replacement for Beaker made by same authors.

ChatOps Tools

• errbot - The easiest and most popular chatbot to implement ChatOps.

CMS

• django-cms - An Open source enterprise CMS based on the Django.
• plone - A CMS built on top of the open source application server Zope.
• feincms - One of the most advanced Content Management Systems built on Django.
• Kotti - A high-level, Pythonic web application framework built on Pyramid.
• mezzanine - A powerful, consistent, and flexible content management platform.
• wagtail - A Django content management system.
• quokka - Flexible, extensible, small CMS powered by Flask and MongoDB.

Code Analysis

• pylint - A fully customizable source code analyzer.
• awesome-static-analysis
• code2flow - Turn your Python and JavaScript code into DOT flowcharts.
• prospector - A tool to analyse Python code.
• pycallgraph - A library that visualises the flow (call graph) of your Python application.
• pylama - A code audit tool for Python and JavaScript.
• black - The uncompromising Python code formatter.
• yapf - Yet another Python code formatter from Google.
• pyre-check - Performant type checking.
• MonkeyType - A system for Python that generates static type annotations by collecting runtime types
• coala - Language independent and easily extendable code analysis application.
• flake8 - A wrapper around pycodestyle, pyflakes and McCabe.
• mypy - Check variable types during compile time.

Code Quality

• Codacy - Automated Code Review to ship better code, faster.
• CodeFactor - Automated Code Review for Git.
• Landscape - Hosted continuous Python code metrics.
• PEP 8 Speaks - GitHub integration to review code style.

Command-line Interface Development

• docopt - Pythonic command line arguments parser.
• colorama - Cross-platform colored terminal text.
• clint - Python Command-line Application Tools.
• docopt - Pythonic command line arguments parser.
• python-fire - A library for creating command line interfaces from absolutely any Python object.
• asciimatics - A package to create full-screen text UIs (from interactive forms to ASCII animations).
• bashplotlib - Making basic plots in the terminal.
• tqdm - Fast, extensible progress bar for loops and CLI.
• cliff - A framework for creating command-line programs with multi-level commands.
• colorama - Cross-platform colored terminal text.
• cement - CLI Application Framework for Python.
• python-prompt-toolkit - A library for building powerful interactive command lines.
• click - A package for creating beautiful command line interfaces in a composable way.

Command-line Tools

• doitlive - A tool for live presentations in the terminal.
• howdoi - Instant coding answers via the command line.
• PathPicker - Select files out of bash output.
• percol - Adds flavor of interactive selection to the traditional pipe concept on UNIX.
• thefuck - Correcting your previous console command.
• try - A dead simple CLI to try out python packages - it's never been easier.
• httpie - A command line HTTP client, a user-friendly cURL replacement.
• kube-shell - An integrated shell for working with the Kubernetes CLI.
• mycli - A Terminal Client for MySQL with AutoCompletion and Syntax Highlighting.
• pgcli - Postgres CLI with autocompletion and syntax highlighting.
• saws - A Supercharged aws-cli.
• tmuxp - A tmux session manager.
• cookiecutter - A command-line utility that creates projects from cookiecutters (project templates).

Compatibility

• six - Python 2 and 3 compatibility utilities.
• python-modernize - Modernizes Python code for eventual Python 3 migration.
• six - Python 2 and 3 compatibility utilities.

Computer Vision

• OpenCV - Open Source Computer Vision Library.
• SimpleCV - An open source framework for building computer vision applications.
• pytesseract - Another wrapper for Google Tesseract OCR.
• SimpleCV - An open source framework for building computer vision applications.

Concurrency and Parallelism

• concurrent.futures - (Python standard library) A high-level interface for asynchronously executing callables.
• multiprocessing - (Python standard library) Process-based parallelism.
• eventlet - Asynchronous framework with WSGI support.
• gevent - A coroutine-based Python networking library that uses greenlet.
• eventlet - Asynchronous framework with WSGI support.
• uvloop - Ultra fast implementation of asyncio event loop on top of libuv.
• scoop - Scalable Concurrent Operations in Python.

Configuration

• configparser - (Python standard library) INI file parser.
• profig - Config from multiple formats with value conversion.
• configobj - INI file parser with validation.
• python-decouple - Strict separation of settings from code.

Continuous Integration

• CircleCI - A CI service that can run very fast parallel testing.
• Wercker - A Docker-based platform for building and deploying applications and microservices.
• awesome-CIandCD
• Vexor CI - A continuous integration tool for private apps with pay-per-minute billing model.
• Travis CI - A popular CI service for your open source and private projects. (GitHub only)

Cryptography

• cryptography - A package designed to expose cryptographic primitives and recipes to Python developers.
• passlib - Secure password storage/hashing library, very high level.
• paramiko - The leading native Python SSHv2 protocol library.
• pynacl - Python binding to the Networking and Cryptography (NaCl) library.

Data Analysis

• Pandas - A library providing high-performance, easy-to-use data structures and data analysis tools.
• Blaze - NumPy and Pandas interface to Big Data.
• Open Mining - Business Intelligence (BI) in Pandas interface.
• Orange - Data mining, data visualization, analysis and machine learning through visual programming or scripts.
• Optimus - Agile Data Science Workflows made easy with PySpark.

Database

• pickleDB - A simple and lightweight key-value store for Python.
• tinydb - A tiny, document-oriented database.
• ZODB - A native object database for Python. A key-value and object graph database.

Database Drivers

• awesome-postgres
• psycopg2 - The most popular PostgreSQL adapter for Python.
• pymssql - A simple database interface to Microsoft SQL Server.
• py2neo - Python wrapper client for Neo4j's restful interface.
• awesome-mysql
• PyMySQL - A pure Python MySQL driver compatible to mysql-python.
• queries - A wrapper of the psycopg2 library for interacting with PostgreSQL.
• pymssql - A simple database interface to Microsoft SQL Server.
• cassandra-driver - The Python Driver for Apache Cassandra.
• kafka-python - The Python client for Apache Kafka.
• pymongo - The official Python client for MongoDB.
• motor - The async Python driver for MongoDB.
• Telephus - Twisted based client for Cassandra.
• txpostgres - Twisted based asynchronous driver for PostgreSQL.
• txRedis - Twisted based client for Redis.
• mysqlclient - MySQL connector with Python 3 support (mysql-python fork).
• py2neo - Python wrapper client for Neo4j's restful interface.
• happybase - A developer-friendly library for Apache HBase.
• redis-py - The Python client for Redis.

Data Validation

• colander - Validating and deserializing data obtained via XML, JSON, an HTML form post.
• Cerberus - A lightweight and extensible data validation library.
• jsonschema - An implementation of JSON Schema for Python.
• schema - A library for validating Python data structures.
• Schematics - Data Structure Validation.
• valideer - Lightweight extensible data validation and adaptation library.
• voluptuous - A Python data validation library.

Data Visualization

• awesome-javascript
• PyGraphviz - Python interface to Graphviz.
• Altair - Declarative statistical visualization library for Python.
• Bokeh - Interactive Web Plotting for Python.
• awesome-dash
• ggplot - Same API as ggplot2 for R.
• Seaborn - Statistical data visualization using Matplotlib.
• VisPy - High-performance scientific visualization based on OpenGL.
• Matplotlib - A Python 2D plotting library.
• PyGraphviz - Python interface to Graphviz.
• PyQtGraph - Interactive and realtime 2D/3D/Image plotting and science/engineering widgets.
• bqplot - Interactive Plotting Library for the Jupyter Notebook
• Pygal - A Python SVG Charts Creator.

Date and Time

• pytz - World timezone definitions, modern and historical. Brings the tz database into Python.
• Chronyk - A Python 3 library for parsing human-written times and dates.
• dateutil - Extensions to the standard Python datetime module.
• delorean - A library for clearing up the inconvenient truths that arise dealing with datetimes.
• moment - A Python library for dealing with dates/times. Inspired by Moment.js.
• Pendulum - Python datetimes made easy.
• PyTime - A easy-use Python module which aims to operate date/time/datetime by string.
• when.py - Providing user-friendly functions to help perform common date and time actions.
• maya - Datetimes for Humans.

Debugging Tools

• ipdb - IPython-enabled pdb.
• pudb - A full-screen, console-based Python debugger.
• wdb - An improbable web debugger through WebSockets.
• lptrace - strace for Python programs.
• manhole - Debugging UNIX socket connections and present the stacktraces for all threads and an interactive prompt.
• pyringe - Debugger capable of attaching to and injecting code into Python processes.
• python-hunter - A flexible code tracing toolkit.
• line_profiler - Line-by-line profiling.
• memory_profiler - Monitor Memory usage of Python code.
• profiling - An interactive Python profiler.
• py-spy - A sampling profiler for Python programs. Written in Rust.
• vprof - Visual Python profiler.
• icecream - Inspect variables, expressions, and program execution with a single, simple function call.
• django-debug-toolbar - Display various debug information for Django.
• django-devserver - A drop-in replacement for Django's runserver.
• pyelftools - Parsing and analyzing ELF files and DWARF debugging information.
• pdb++ - Another drop-in replacement for pdb.
• pyflame - A ptracing profiler For Python.