The project has been started by Alexis Métaireau and Frédéric Sureau. Friends are
helping since that. Here is the complete list of people who gave a hand:

0livd
Adam Chainz
Adrien CLERC
Alexandre Avenel
Alexis Métaireau
Allan Nordhøy
am97
Andrew Dickinson
Arnaud Bos
Baptiste Jonglez
Benjamin Bouvier
Berteh
bmatticus
Brice Maron
Byron Ullauri
Carey Metcalfe
cbrosnan
Daniel Schreiber
DavidRThrashJr
donkers
Edwin Smulders
Elizabeth Sherrock
eMerzh
Erwan Lacoudre
Feth AREZKI
Frédéric Sureau
Gianluca De Cola
Glandos
Heimen Stoffels
James Leong
Jocelyn Delalande
Lod
Luc Didry
Lucas Verney
Marien Fressinaud
Mathieu Leplatre
mcnesium
mduret
Mesut Akcan
Michal Čihař
nailyk-fr
Nicolas Ferrari
Nikos Epping
Peter Maksymowsky
Quentin Roy
Rémy HUBSCHER
Richard Coates
Salamandar
Saroj Regmi
THANOS SIOURDAKIS
Toover
Xavier Mehrenberger
Youe Graillot
zorun
Zottelchen

The manual drawings are from Coline Billon, they are under CC BY 4.0.