1. python/cpython

1. python/peps
2. microsoft/vscode-python
3. brettcannon/python-launcher
4. microsoft/vscode-jupyter
5. brettcannon/caniusepython3
6. python/devguide
7. microsoft/Pyjion
8. gidgethub/gidgethub
9. brettcannon/oplop
10. brettcannon/desugar
11. brettcannon/dotconfig
12. python/the-knights-who-say-ni
13. brettcannon/free-labour
14. brettcannon/travelbrag
15. pypa/packaging
16. brettcannon/dotfiles
17. Which-Film/which-film.info

1. microsoft/pvscbot
2. brettcannon/mousebender
3. python/importlib_resources
4. PyCQA/modernize
5. brettcannon/release-often
6. python/bedevere
7. python/devinabox
8. brettcannon/WWBD
9. brettcannon/trips-history
10. brettcannon/pep425
11. brettcannon/microvenv
12. brettcannon/check-for-changed-files
13. brettcannon/py-pip
14. pypa/packaging.python.org
15. brettcannon/cpython-wasi-build
16. brettcannon/python-azure-web-app-cookiecutter
17. brettcannon/stdlib-stats
18. brettcannon/mnfy
19. microsoft/vscode-docs-archive
20. dabeaz/curio
21. microsoft/vscode-docs
22. brettcannon/sans-io
23. brettcannon/modutil
24. brettcannon/time-clock
25. elixir-lang/elixir-lang.github.com
26. brettcannon/flatten_filenames
27. brettcannon/find-duplicate-files
28. brettcannon/riscv-harmony
29. uranusjr/packaging-metadata-comparisons
30. brettcannon/basicenum
31. angular/angular.js
32. pypa/setuptools
33. python-trio/trio
34. python/core-workflow
35. dusty-phillips/rescript-zora
36. microsoft/vscode-dev-containers
37. microsoft/vscode-python-devicesimulator
38. Azure-Samples/Azure-MachineLearning-DataScience
39. brettcannon/record-type
40. Azure/msrest-for-python
41. brettcannon/pip-secure-install
42. emmatyping/python-wasm
43. python-hyper/uritemplate
44. Azure/msrestazure-for-python
45. pypa/distutils
46. microsoft/TypeScript-Handbook
47. brettcannon/defy-layout-scorer
48. orsenthil/cpython-hg-to-git
49. python/buildmaster-config
50. python-hglib

1. python3statement/python3statement.github.io
2. benjaminp/six
3. brettcannon/choose-a-font.dev
4. python/steering-council
5. JuliaLang/julia
6. dusty-phillips/match-variant
7. brettcannon/importlib
8. eclipse-archived/ceylon-lang.org
9. lustre-labs/lustre
10. python/blurb
11. microsoft/vscode-telemetry-extractor
12. beeware/toga
13. microsoft/vscode-anaconda-extension-pack
14. rescript-lang/rescript-lang.org
15. brettcannon/nowhere-on-the-web
16. Azure/azure-sdk-for-python
17. python/cherry-picker
18. brettcannon/porting-to-python-3-notebook
19. python/planet
20. rust-lang/rust
21. openlawlibrary/pygls
22. microsoft/vscode
23. micktwomey/pyiso8601
24. python/typeshed
25. brettcannon/vscode-zephyr-asdl
26. Homebrew/homebrew-core
27. github/gitignore
28. Homebrew/legacy-homebrew
29. cookiecutter/cookiecutter
30. pypa/pipenv
31. aosabook/500lines
32. square/dagger
33. WebAssembly/design
34. Mariatta/github-bot-tutorial
35. brettcannon/cpython-wasi-buildbot
36. dotnet/docs
37. microsoft/vscode-wiki
38. vstinner/misc
39. inko-lang/inko
40. micropython/micropython
41. python/psf-salt
42. jazzband/pip-tools
43. thechangelog/show-notes
44. badges/shields
45. matplotlib/matplotlib
46. ponylang/pony-tutorial
47. riverscuomo/apps
48. dabeaz/ply
49. conda/ceps
50. astral-sh/ruff
51. asyncio-docs/asyncio-doc
52. python/core-sprint
53. microsoft/TypeScript-wiki
54. conda/conda
55. microsoft/vscode-docker
56. python-hyper/h2
57. bytecodealliance/wasmtime
58. kushaldas/pym
59. python/typing
60. WebAssembly/wasi-sdk
61. MeeseeksBox/meeseeksbox.github.io
62. beeware/liquid-demo
63. jaraco/skeleton
64. bloodyowl/rescript-test
65. fastapi/sqlmodel
66. python/python-docs-theme
67. pyscript/pyscript
68. pypa/flit
69. MPOS/php-mpos
70. huggingface/agents-course
71. kushaldas/pep582
72. microsoft/sql-server-samples
73. buildout/buildout
74. python/pythonineducation.org
75. microsoft/language-server-protocol
76. progit/progit2
77. MicrosoftDocs/visualstudio-docs
78. microsoft/vscode-isort
79. rustwasm/book
80. python/pyperformance
81. aio-libs/aiohttp
82. microsoft/vscode-python-templates
83. microsoftarchive/msgraph-sdk-python
84. moby/mobywebsite
85. sarugaku/resolvelib
86. vibora-io/vibora
87. gleam-lang/language-tour
88. larryhastings/appeal
89. Django
90. Devid-Ba/Text-adventure
91. gleam-lang/gleam
92. clearlydefined/website
93. stellar-deprecated/docs
94. stellar/awesome-stellar
95. bungcip/better-toml
96. gleam-lang/website
97. microsoft/python-sample-vscode-django-tutorial
98. palantir/python-language-server
99. Homebrew/brew
100. brettcannon/character-frequency
101. devcontainers/images
102. microsoft/vscode-tools-for-ai
103. vega/ipyvega
104. Quansight-Labs/free-threaded-compatibility
105. PyCQA/pyflakes
106. python/importlib_metadata
107. google/grumpy
108. rust-lang/rustfmt
109. golang/go
110. microsoft/vscode-extension-samples
111. getsentry/responses
112. diogonfs/pyinit
113. microsoft/debugpy
114. astral-sh/uv
115. saschpe/mozilla-plugins
116. nayafia/nayafia
117. reubeno/brush
118. gleam-lang/otp
119. pycascades/welcome-wagon-2018
120. twisted/klein
121. pypa/setuptools-scm
122. livebook-dev/livebook
123. microsoftgraph/python-sample-pagination
124. lorenzofox3/zora
125. psf/fundable-packaging-improvements
126. pyvideo/old-pyvideo
127. jupyter/notebook
128. microsoftgraph/microsoft-graph-docs-contrib
129. absurdia/absurdia-py
130. pypa/trove-classifiers
131. realpython/python-guide
132. pypa/build
133. oauthlib/oauthlib
134. chhantyal/py3readiness
135. pypa/pipx
136. spotify/pedalboard
137. hynek/build-and-inspect-python-package
138. Fyrd/caniuse
139. pypi/warehouse
140. microsoft/PTVS
141. python/mypy
142. ebkalderon/tower-lsp
143. gitkraken/vscode-gitlens
144. regebro/supporting-python-3
145. sphinx-doc/sphinx
146. wntrblm/nox
147. adafruit/Adafruit_CircuitPython_CircuitPlayground
148. briandealwis/ferret
149. microsoft/vscode-pylint
150. luabud/hello-vscodespaces
151. cometkim/rescript-vitest
152. psf/black
153. conda/conda-build
154. actions-rs/install
155. MicrosoftDocs/azure-docs
156. rocketreach/rocketreach_python
157. syl20bnr/spacemacs
158. kushaldas/asaman
159. python-poetry/tomlkit
160. cardoe/stderrlog-rs
161. okken/pytest-srcpaths
162. devcontainers/features
163. aurelia/documentation
164. score-spec/spec
165. GraphQLGuide/book
166. MagicStack/MagicPython
167. pdm-project/pdm
168. vscode-restructuredtext/vscode-restructuredtext
169. psf/webassembly
170. bagder/http2-explained
171. jupyter-book/mystmd.org
172. python/pythontestdotnet
173. Lukasa/language-restructuredtext
174. stellar/new-docs
175. lustre-labs/ui
176. victor-o-silva/python-links-from-link-header
177. VSCodeVim/Vim
178. topazproject/topaz
179. pytest-dev/pytest
180. microsoft/az-partner-center-cli
181. Enderchief/gleam-tools
182. pyca/pyopenssl
183. scikit-learn/scikit-learn
184. markshannon/faster-cpython
185. w3c/ServiceWorker
186. Azure/azure-cosmos-python
187. ericpalakovichcarr/pytest-pythonpath
188. Azure/azure-cli
189. 11ty/11ty-website
190. Azure/azure-functions-python-library
191. starship/starship
192. bitbldr/sprocket_docs
193. zwaldowski/match-label-action
194. rust-lang/log
195. dusty-phillips/macabre
196. casey/just
197. jupyterlab/jupyterlab
198. conda/conda-docs
199. pablogsal/cpython_leaderboard
200. mozilla-services/konfig
201. extism/extism
202. riverscuomo/new-albums
203. google/yapf
204. WebAssembly/component-model
205. jupyter/jupyter.github.io
206. pyvideo/data
207. mesonbuild/meson
208. ansible/ansible
209. riscv-software-src/riscv-tests
210. facebook/pyre-check
211. PyPy
212. defusedexpat
213. expat
214. Mercurial
215. vim
216. smol

(Listed from oldest to newest, although I may have become a co-author post-creation.)

1. Alyssa Coghlan (53)
2. Guido van Rossum (49)
3. Barry Warsaw (41)
4. Victor Stinner (34)
5. Brett Cannon (32)
6. Donald Stufft (21)
7. Petr Viktorin (19)
8. Martin von Löwis (17)
9. Łukasz Langa (15)
10. Nathaniel J. Smith (15)
11. Steve Dower (15)
12. Raymond Hettinger (14)
13. Antoine Pitrou (13)
14. Mark Shannon (12)
15. Eric Snow (12)
16. Georg Brandl (11)
17. Tim Peters (10)
18. A.M. Kuchling (10)
19. Marc-André Lemburg (9)
20. Paul Moore (9)
21. Yury Selivanov (8)
22. Larry Hastings (8)
23. Christian Heimes (8)
24. Ivan Levkivskyi (8)
25. Pradyun Gedam (8)
26. Jeremy Hylton (7)
27. Thomas Wouters (7)
28. Moshe Zadka (7)
29. Benjamin Peterson (7)
30. Dustin Ingram (7)
31. Ee Durbin (7)
32. David Goodger (6)
33. Ka-Ping Yee (6)
34. Jim J. Jewett (6)
35. Phillip J. Eby (6)
36. Daniel Holth (6)
37. Chris Angelico (6)
38. Inada Naoki (6)
39. Pablo Galindo (6)
40. Brandt Bucher (6)
41. Pablo Galindo Salgado (6)
42. Tzu-ping Chung (6)
43. Jelle Zijlstra (6)
44. William Woodruff (6)
45. Collin Winter (6)
46. Anthony Baxter (5)
47. Neil Schemenauer (5)
48. Skip Montanaro (5)
49. Ethan Furman (5)
50. Talin (5)
51. Eric Traut (5)
52. Irit Katriel (5)
53. Paul Prescod (4)
54. Gregory Ewing (4)
55. Richard Jones (4)
56. Tarek Ziadé (4)
57. Carl Meyer (4)
58. Jukka Lehtosalo (4)
59. Thomas Kluyver (4)
60. Emma Harper Smith (4)
61. Jeroen Demeyer (4)
62. Mariatta (4)
63. Lysandros Nikolaou (4)
64. Ofek Lev (4)
65. Pradeep Kumar Srinivasan (4)
66. Travis Oliphant (3)
67. Michel Pelletier (3)
68. Alex Martelli (3)
69. Michael Hudson (3)
70. Neal Norwitz (3)
71. Steven Bethard (3)
72. Armin Ronacher (3)
73. Carol Willing (3)
74. Eli Bendersky (3)
75. Eric V. Smith (3)
76. Steven D'Aprano (3)
77. Jeffrey Yasskin (3)
78. Batuhan Taskaya (3)
79. Filipe Laíns (3)
80. Erlend Egeberg Aasland (3)
81. James Hilton-Balfe (3)
82. Zac Hatfield-Dodds (3)
83. Shantanu Jain (3)
84. Sergey B Kirpichev (3)
85. Gregory P. Smith (3)
86. Hugo van Kemenade (3)
87. Ewa Jodlowska (3)
88. Aahz (2)
89. Oleg Broytman (2)
90. Fred L. Drake (2)
91. Jr. (2)
92. David Ascher (2)
93. Greg Wilson (2)
94. Gordon McMillan (2)
95. Christopher A. Craig (2)
96. Clark C. Evans (2)
97. Greg Stein (2)
98. Magnus Lie Hetland (2)
99. Jack Jansen (2)
100. Vinay Sajip (2)
101. Mark Hammond (2)
102. Josiah Carlson (2)
103. Terry Reedy (2)
104. Facundo Batista (2)
105. Ben Finney (2)
106. Calvin Spealman (2)
107. Tim Delaney (2)
108. Jesse Noller (2)
109. Stephen J. Turnbull (2)
110. Dirkjan Ochtman (2)
111. Miro Hrončok (2)
112. Cameron Simpson (2)
113. Alex Gaynor (2)
114. Ronald Oussoren (2)
115. Trishank Karthik Kuppusamy (2)
116. Vladimir Diaz (2)
117. Marina Moore (2)
118. Justin Cappos (2)
119. Stefano Borini (2)
120. Stefan Behnel (2)
121. Ned Deily (2)
122. Alexander Belopolsky (2)
123. Nick Humrich (2)
124. Mark E. Haase (2)
125. Robert Collins (2)
126. Koos Zevenhoven (2)
127. Cory Benfield (2)
128. Marcel Plch (2)
129. Mario Corchero (2)
130. Geoffrey Thomas (2)
131. Maggie Moss (2)
132. Stéphane Bidoul (2)
133. Mark Mendoza (2)
134. Shannon Zhu (2)
135. Paul Ganssle (2)
136. Daniel F Moisset (2)
137. Tobias Kohn (2)
138. David Foster (2)
139. Tal Einat (2)
140. Steven Troxler (2)
141. Erik De Bonte (2)
142. Sam Gross (2)
143. Ralf Gommers (2)
144. Facundo Tuesca (2)
145. Savannah Ostrowski (2)
146. Hood Chatham (2)
147. Daniel Stutzbach (2)
148. Joe Carey (2)
149. Martijn Faassen (1)
150. The Python core team and community (1)
151. Paul Barrett (1)
152. Peter Schneider-Kamp (1)
153. Huaiyu Zhu (1)
154. Gregory Lielens (1)
155. Paul F. Dubois (1)
156. Sean Reifschneider (1)
157. Grant Griffin (1)
158. Jonathan Riehl (1)
159. Jason Petrone (1)
160. Frédéric B. Giacometti (1)
161. James C. Ahlstrom (1)
162. Jim Althoff (1)
163. Neil Hodgson (1)
164. Trent Mick (1)
165. David Eppstein (1)
166. Walter Dörwald (1)
167. Oren Tirosh (1)
168. Stepan Koltsov (1)
169. Scott Gilbert (1)
170. Thomas Heller (1)
171. Jeff Epler (1)
172. Just van Rossum (1)
173. Thomas Bellman (1)
174. Kevin Altis (1)
175. Dave Cole (1)
176. Andrew McNamara (1)
177. Cliff Wells (1)
178. Jack Diederich (1)
179. Peter Harris (1)
180. Roman Suzi (1)
181. Mike Meyer (1)
182. W Isaac Carroll (1)
183. Terence Way (1)
184. Steven Taschuk (1)
185. Kevin D. Smith (1)
186. Peter Astrand (1)
187. Samuele Pedroni (1)
188. Christian R. Reis (1)
189. Andrew McClelland (1)
190. Michael P. Dubner (1)
191. Micah Elliott (1)
192. Björn Lindqvist (1)
193. Jiwon Seo (1)
194. Ben North (1)
195. Lino Mastrodomenico (1)
196. Richard Oudkerk (1)
197. Alexandre Vassalotti (1)
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199. Kerrick Staley (1)
200. Greg Slodkowicz (1)
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202. Paul Colomiets (1)
203. Daniel Urban (1)
204. Benoit Bryon (1)
205. Lennart Regebro (1)
206. Todd Rovito (1)
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