A non-exhaustive list of contributors in no particular order:

James Coxon (jcoxon, M6JCX)
Daniel Richman (DanielRichman, 2E0DRX)
Robert Harrison (rjharrison, 2E0RJH)
Philip Heron (fsphil, 2I0VIM)
Adam Greig (Randomskk, M0RND)
Simrun Basuita (sbasuita, M6SBX)