c-ares is based on ares, and these are the people that have worked on it since
the fork was made:

Albert Chin
Alexander Lazic
Alexey Simak
Andreas Rieke
Andrew Andkjar
Andrew Ayer
Andrew C. Morrow
Ashish Sharma
Ben Greear
Ben Noordhuis
BogDan Vatra
Brad House
Brad Spencer
Bram Matthys
Dan Fandrich
Daniel Johnson
Daniel Stenberg
David Drysdale
David Stuart
Denis Bilenko
Dima Tisnek
Dirk Manske
Dominick Meglio
Doug Goldstein
Doug Kwan
Duncan Wilcox
Eino Tuominen
Erik Kline
Fedor Indutny
Frederic Germain
George Neill
Gisle Vanem
Gregor Jasny
Guenter Knauf
Guilherme Balena Versiani
Gunter Knauf
Henrik Stoerner
Jakub Hrozek
James Bursa
Jérémy Lal
Lei Shi
Marko Kreen
Michael Wallner
Mike Crowe
Nick Alcock
Nick Mathewson
Nicolas "Pixel" Noble
Patrik Thunstrom
Peter Pentchev
Phil Blundell
Poul Thomas Lomholt
Ravi Pratap
Robin Cornelius
Sebastian at basti79.de
Shmulik Regev
Stefan Bühler
Steinar H. Gunderson
Svante Karlsson
Tofu Linden
Tom Hughes
Tor Arntsen
Vlad Dinulescu
William Ahern
Yang Tse
liren at vivisimo.com