Python

SciPy

Python-based ecosystem of open-source software for mathematics, science, and engineering. Contains modules for optimization, linear algebra, integration, interpolation, special functions, FFT, signal and image processing, ODE solvers and other tasks common in science and engineering.

Twisted

Event-driven network programming framework written in Python and licensed under the MIT License. Twisted projects variously support TCP, UDP, SSL/TLS, IP multicast, Unix domain sockets, a large number of protocols, and much more.

Virtualenv

Software, program or system that implements, manages and controls multiple virtual environment instances. A tool to create isolated Python environments. Virtualenv will let you define isolated Python runtime environments without harming the root or system python installation.

Web2py

A major goal of web2py is ease of use, from setup, to learning, to coding, to distribution, to deployment. It manages to achieve that goal quite well while offering a very rich feature set and allowing a lot of flexibility.

web.py

Web framework for Python that is as simple as it is powerful. Web.py is in the public domain; you can use it for whatever purpose with absolutely no restrictions.

Web scraping

Web scraping is the process of extracting data from websites. It involves fetching web pages, parsing the content, and extracting specific information for various purposes, such as data analysis, research, or building applications. Python is a popular choice for web scraping due to its versatile libraries and tools like Beautiful Soup and Scrapy.

weppy

weppy is an open-source web framework for Python that is designed to be lightweight and easy to use. It is focused on simplifying web application development with Python by providing a clear and expressive syntax.

wheezy.web

wheezy.web is a lightweight, high-performance, and efficient web framework for the Python programming language. It is designed to help developers build web applications and RESTful APIs by providing tools and features for routing, templating, caching, and more. 

wxPython

GUI  toolkit for Python that is a wrapper around the wxWidgets C++ GUI library. wxPython provides a large variety of window types and controls, all implemented with a native look and feel (by using the native widgets) on the platforms upon which it is supported.

Zope

Zope is an open-source web application server and framework written in Python. It provides a platform for building dynamic web applications and content management systems, emphasizing reusability and extensibility.