Best open-source Python packaging and PyPI tools (2026)

A command-line tool that checks whether a Python package's sdist includes all version-controlled files, and can update MANIFEST.in to fix gaps.

A command-line utility for uploading Python source and wheel distributions to PyPI, independent of the build system used.

A simple tool for building and publishing pure-Python packages and modules to PyPI with minimal configuration.

Official build system repository for Setuptools, the Python packaging library used to build and distribute Python projects.

Installs and runs Python command-line applications in isolated environments so their dependencies never conflict with each other or the system.

The standard package installer for Python, used to install packages from the Python Package Index (PyPI) and other indexes.

A curated list of domestic China mirror sites for package managers, OS images, and common software downloads.

A dialect-flexible SQL linter and auto-formatter that checks and fixes SQL style and errors, including Jinja and dbt templated code.

A Python library for automating website interaction, storing cookies, following links and submitting forms without a browser engine.

A Python project generator that bootstraps installable, PyPI-ready packages with tox, pytest, Sphinx docs and Git versioning preconfigured.