Many people contributed to pysnmp by reporting problems, suggesting
various improvements or submitting actual code. The list goes
in a more-or-less chronological order:

Cameron Laird
Case Vanhorsen
Jarkko Torppa
Tim Kwiatkowski
Carlos Ribeiro
Chris Green
Doobee R. Tzeck
Jim Crumpler
Roy Smith
Mark Kilmartin
Matthew W. Samsonoff
John P Speno
Mike C. Fletcher
Wichert Akkerman
Hernan Perez Masci
Martin Jackson
Ivan Zderadicka
Randy Couey
Brian Kyckelhahn
Mark M Evans
Filippo Giunchedi at Truelite Srl
Matt Hooks
Zachary Lorusso
Floris Bruynooghe
Laurelin of Middle Earth
Thanks to Python Software Foundation for granting financial support 
for the project.