Implementations Based on pygls

Name	Maintainer	Repository (optional)	Notes
Aeon Programming Language	Alcides Fonseca	aeon	A programming language with liquid types and program synthesis built-in.
Anakin Language Server	Andrii Kolomoiets	anakin-language-server	Yet another Jedi Python Language Server
Chapel Language Server	Chapel Team	chapel	Chapel language server
Cmake Language Server	Regen100	cmake-language-server	CMake LSP Implementation
Codify Language Server	Open Law Library	(closed source)	Used in our VS Code extension, Codify
CrossHair Language Server	Phillip Schanely	CrossHair	Supports this VS Code extension for Python contract testing.
Esbonio Language Server	Alex Carney	esbonio	Language server for Sphinx documentation projects
Helios Language Server	et9797	helios-language-server	Language Server for Helios smart contract language
Hy Language Server	Rintaro Okamura	hy-language-server	Hy Language Server wrapping Jedhy
Jedi Language Server	Samuel Roeca	jedi-language-server	Python Language Server wrapping Jedi
RPM Spec Language Server	Dan Čermák	rpm-spec-language-server	Language Server for RPM Spec files
Ruff Language Server	Charlie Marsh	ruff-lsp	Language Server for Python’s ruff
Systemd Language Server	Paweł Sacawa	systemd-language-server	Systemd Unit File Language Server
VSCode autopep8 extension	Microsoft	vscode-autopep8	VSCode extension for Python’s autopep8
VSCode black extension	Microsoft	vscode-black-formatter	VSCode extension for Python’s black
VSCode isort extension	Microsoft	vscode-isort	VSCode extension for Python’s isort
VSCode flake8 extension	Microsoft	vscode-flake8	VSCode extension for Python’s flake8
VSCode Kedro extension	Kedro	vscode-kedro	Kedro Langauge Server and schema validation extension
VSCode mypy extension	Microsoft	vscode-mypy	VSCode extension for Python’s mypy
VSCode pylint extension	Microsoft	vscode-pylint	VSCode extension for Python’s pylint
VSCode ufmt extension	Omnilib	vscode-ufmt	VSCode extension for Python’s ufmt
YARA Language Server	Avast	yls	Language Server for YARA
zc.buildout Language Server	Jérome Perrin	zc.buildout.languageserver	Language Server for zc.buildout profiles.

(alphabetic by name, maintainer)

Tools Based on pygls

Name	Maintainer	Repository (optional)	Notes
lsp-devtools	Alex Carney	lsp-devtools	An experiment in building web browser inspired developer tooling for language servers
pytest-lsp	Alex Carney	lsp-devtools	pytest plugin for testing language servers