Python

PyPy

PyPy is an alternative implementation of the Python programming language that aims to improve its performance. It utilizes a Just-In-Time (JIT) compiler to execute Python code faster than the standard CPython interpreter.

PyQt

PyQt is a set of Python bindings for the Qt application framework, which is a set of C++ libraries and development tools. It allows developers to create cross-platform graphical user interfaces (GUIs) for desktop applications using Python.

Pyramid

Python web framework that grew out of the Pylons project. It is designed to make creating web applications easier. Pyramid provides only the core tools needed for nearly all web applications: mapping URLs to code, security, and serving static assets (files like JavaScript and CSS).

PySide

PySide is a set of Python bindings for the Qt application framework, enabling developers to create cross-platform graphical user interfaces (GUIs) for desktop applications using Python. It's similar to PyQt but is developed by the Qt for Python community, offering an alternative to PyQt for creating Qt-based applications in Python.

Pyston

Python implementation that aims to be both highly compatible and high-performance. It uses modern JIT techniques and natively supports many CPython C extension modules.

Python

Popular general purpose programming language whose philosophy focuses mainly on code readability and maintainability. As a high level, interpreted language, Python is easy to learn for those who want to start coding.

Python frameworks

Django, Flask, Pyramid, Pylons, SQLAlchemy, web2py, Kivy, Tornado.

Quart

Quart is an open-source Python framework designed for building asynchronous web applications. It's built on top of the popular Flask framework and leverages asynchronous programming to handle a large number of concurrent requests efficiently.

Reahl

Reahl is a Python framework for developing web applications. It provides a high-level abstraction for creating web applications in a more productive and maintainable way.

Ren'Py

Ren'Py is a free and open-source visual novel engine written in Python for creating interactive storytelling experiences. It simplifies the development of visual novels by providing tools for scripting and designing characters, backgrounds, and choices within the narrative.

Robot Framework

The Robot Framework is an open-source test automation framework for acceptance testing, behavior-driven development, and robotic process automation. It uses a keyword-driven approach to make test automation accessible to individuals who are not primarily programmers.

Sanic

Sanic is an open-source Python framework designed for building asynchronous web applications and high-performance APIs. It leverages asynchronous programming to handle a large number of concurrent requests efficiently.

Scapy

Python program that enables the user to send, sniff and dissect and forge network packets. This capability allows construction of tools that can probe, scan or attack networks.

Scrapy

Python framework for large scale web scraping and web crawling.

Scribus

Scribus is an open-source desktop publishing (DTP) application that allows users to create and design various forms of printed and digital documents, including brochures, magazines, newsletters, posters, and more. It provides a wide range of layout and design tools, making it a popular choice for small businesses, non-profit organizations, and individuals looking to create professional-quality publications. 

Seaborn

Python visualization library based on matplotlib. It provides a high-level interface for drawing attractive statistical graphics. It is built on top of matplotlib and tightly integrated with the PyData stack, including support for numpy and pandas data structures and statistical routines from scipy and statsmodels.

StatsModels

Python package that allows users to explore data, estimate statistical models, and perform statistical tests. Provides the statistical backend for other Python libraries. Released under the open source Modified BSD (3-clause) license. 

SymPy

It is a lightweight Python library for symbolic computation. SymPy can be extended with additional functions or implemented into other applications. It can perform a range of different calculations, from simple algebraic to quantum physics and discrete mathematics.

SQLAlchemy

Database manipulation tool for python which can be used as standalone library to manipulate relational databases. SQLalchemy provides core python based sql expressions and object oriented python based ORM. it also provide high level declarative sysntax for ORM for simplicity.

Testify

Testify is an open-source Python unit testing framework that simplifies the process of writing and running tests for Python code. It provides a straightforward way to create and organize test cases and assertions, making it easier for developers to perform unit testing.

TextBlob

TextBlob is a Python library for processing textual data. It provides simple and consistent APIs for common natural language processing (NLP) tasks like part-of-speech tagging, noun phrase extraction, sentiment analysis, and translation.

Theano

Python library that allows you to define, optimize, and evaluate mathematical expressions involving multi-dimensional arrays efficiently. It can use GPUs and perform efficient symbolic differentiation.

Tkinter

Tkinter is a built-in Python library for creating graphical user interfaces (GUIs) for desktop applications. It provides a set of tools and widgets to design and interact with windows, buttons, menus, and other GUI elements.

Tornado

A version of the scalable, non-blocking web server and tools that power FriendFeed. The FriendFeed application is written using a web framework that looks a bit like web.py or Google's webapp, but with additional tools and optimizations to take advantage of the underlying non-blocking infrastructure.

TurboGears

TurboGears is an open-source web application framework for Python that aims to simplify web development by providing a set of tools and components for creating web applications quickly and efficiently. It is designed around the MVC architecture that is similar to Ruby on Rails or Struts.