The WCSTools package was developed by Doug Mink at the Smithsonian Astrophysical Observatory, with significant code from

• Mark Calabretta of CSIRO (projection),
• Bill Cotton of NRAO (projection),
• Pat Wallace of Rutherford Appleton Laboratory, UK (coordinate conversion), and
• Elwood Downey of the University of Iowa (WCS fitting procedure).

Debugging help has come from

• Bill Joye (ds9) and Eric Mandel (SAOtng) of SAO for the subroutine library,
• Allan Brighton (SkyCat) of ESO for the subroutine library,
• Jean-Baptiste Marquette of the Institut d'Astrophysique de Paris for programs and subroutines,
• Norman Grogin, Dan Koranyi, Scott Kenyon, Susan Tokarz, and Steve Willner of SAO for FITS and WCS programs, and
• Andreas Jaunsen for WCS programs.