Matt Shotwell [aut, cre],
  Clint Cummins [ctb]

Fabio Centofanti [cre, aut],
  Antonio Lepore [aut],
  Biagio Palumbo [aut]

Doug Hemken [aut, cre] (SSCC, Univ. of Wisconsin-Madison),
  Chao Cheng [ctb] (Statistician, Simcere Pharmaceutical Group Limited)

Original by Littell, Milliken, Stroup, and Wolfinger,
  modifications by Douglas Bates <bates@stat.wisc.edu>, Martin Maechler,
  Ben Bolker and Steven Walker

Liming Li [aut, cre],
  Daniel Sabanes Bove [aut],
  Isaac Gravestock [aut],
  F. Hoffmann-La Roche AG [cph, fnd]

Joe Cheng [aut],
  Timothy Mastny [aut],
  Richard Iannone [aut] (<https://orcid.org/0000-0003-3925-190X>),
  Barret Schloerke [aut] (<https://orcid.org/0000-0001-9986-114X>),
  Carson Sievert [aut, cre] (<https://orcid.org/0000-0002-4958-2844>),
  Christophe Dervieux [ctb] (<https://orcid.org/0000-0003-4474-2498>),
  RStudio [cph, fnd],
  Sass Open Source Foundation [ctb, cph] (LibSass library),
  Greter Marcel [ctb, cph] (LibSass library),
  Mifsud Michael [ctb, cph] (LibSass library),
  Hampton Catlin [ctb, cph] (LibSass library),
  Natalie Weizenbaum [ctb, cph] (LibSass library),
  Chris Eppstein [ctb, cph] (LibSass library),
  Adams Joseph [ctb, cph] (json.cpp),
  Trifunovic Nemanja [ctb, cph] (utf8.h)

Thomas Nauss, Hanna Meyer, Tim Appelhans, Florian Detsch

Héctor Villalobos and Eduardo González-Rodríguez <egonzale@cicese.mx>

Muhammad Kashif Hanif [cre, aut],
  Muhammad Umer Sarwar [aut],
  Rehman Ahmad [aut],
  Zeeshan Ahmad [aut],
  Karl-Heinz Zimmermann [aut]

Mo Huang [aut, cre],
  Nancy Zhang [aut],
  Mingyao Li [aut]

Thomas Kuenzel [aut, cre],
  Kaspar Rufibach [aut],
  Regina Stegherr [aut],
  Daniel Sabanés Bové [aut],
  F. Hoffmann-La Roche AG [cph, fnd],
  Universität Ulm [cph, fnd]

Alexander Murph [aut, cre] (<https://orcid.org/0000-0001-7170-867X>)

Maximilian Toller [aut],
  Tiago Santos [aut, cre],
  Roman Kern [aut]

Rajeev Ranjan Kumar [aut, cre],
  Girish Kumar Jha [aut, ths, ctb],
  Dwijesh C. Mishra [ctb],
  Neeraj Budhlakoti [ctb]

Yoann Robin [aut, cre],
  Mathieu Vrac [cph]