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

Daniel Stenberg
Dominick Meglio
liren at vivisimo.com
James Bursa
Duncan Wilcox
Dirk Manske
Dan Fandrich
Gisle Vanem
Gunter Knauf
Henrik Stoerner
Yang Tse
Nick Mathewson
Alexander Lazic
Andreas Rieke
Guilherme Balena Versiani
Brad Spencer
Ravi Pratap
William Ahern
Bram Matthys
Michael Wallner
Vlad Dinulescu
Brad House
Shmulik Regev
Ashish Sharma
Steinar H. Gunderson
Robin Cornelius
Erik Kline
Alexey Simak
Eino Tuominen
Doug Goldstein
Sebastian at basti79.de