- Andreas Haller (@ahx)
- Bryan Helmkamp (@brynary)
- @bonkydog
- Caleb Spare (@cespare)
- Christopher Redinger (@redinger)
- David Chelimsky (@dchelimsky)
- David Padilla (@dabit)
- Dmitry Ratnikov (@ratnikov)
- Eugene Pimenov (@libc)
- Evan Phoenix (@evanphx)
- Gabriel Horner (@cldwalker)
- Gavin Miller (@gavingmiller)
- James McCarthy (@james2m)
- Jan Nelson
- Jay Adkisson (@jayferd)
- Joe Ferris (@jferris)
- Matt Buck (@techpeace)
- Matthew O'Connor
- Michael Niessner (@niessner)
- Mike Mangino (@mmangino)
- Nathan Sobo (@nathansobo)
- Nick Kallen (@nkallen)
- Nick Novitski (@nicknovitski)
- Phil Darnowsky (@phildarnowsky)
- Steven R. Baker (@srbaker)
- Tatsuya Ono (@ono)
- Thibaut Corouble (@thibaut)
- Wincent Colaiuta (@wincent)
- @wynst
- Aslak Hellesoy for developing RSpec
- Dan North for syntax ideas
- Dave Astels for some BDD inspiration
- Dave Myron for a bug report
- David Chelimsky for encouragement to make the RR framework, for developing the RSpec mock framework, syntax ideas, and patches
- Daniel Sudol for identifing performance issues with RR
- Gerard Meszaros for his excellent book "xUnit Test Patterns"
- Felix Morio for pairing
- James Mead for developing Mocha
- Jeff Whitmire for documentation suggestions
- Jim Weirich for developing Flexmock, the first terse ruby mock framework in Ruby
- Myron Marston for bug reports
- Parker Thompson for pairing
- Pivotal Labs for sponsoring RR development
- Steven Baker for developing RSpec
- Tuomas Kareinen for a bug report