| Author | Implementations |
| Teknovore | 16 |
| Jay Kominek | 6 |
| Tim Newsome | 5 |
| Markus Kliegl | 4 |
| Abhijit Menon-Sen | 4 |
| Liandrin | 3 |
| shafalus | 2 |
| unSlider | 2 |
| Joe Fouche | 1 |
| 1 | |
| Wayne Hayter | 1 |
| Daniel Cristofani | 1 |
| Glyn Webster | 1 |
| Zak Greant | 1 |
| Steven Young | 1 |
| Peter Schachte | 1 |
| Chris Kjaer | 1 |
| Eric Bock | 1 |
| Mike Acar | 1 |
| Chris Heschong | 1 |
| Patrice Ossona de Mendez | 1 |
| Boris Forman | 1 |
| Tobias Nissen | 1 |
| Ørjan Johansen | 1 |
| Matthew Kane | 1 |
| Stevan Apter | 1 |
| Hubert Tonneau | 1 |
| Arnt Gulbrandsen | 1 |
| Thomas Kohn | 1 |
| Juergen Stuber | 1 |
| Richard Demanowski | 1 |
| Arvid St we | 1 |
| YVII | 1 |
| Jason Jackson | 1 |
| Claes Wikstrom | 1 |
| John D. Hudson | 1 |
| Loren Blaney | 1 |
| Günter Rensch | 1 |
| David Taylor | 1 |
| Roberto Ierusalims | 1 |
| Ray R | 1 |
| Mike Acar's contribution however, cannot be properly expressed in a tally of implementations. He devised the fast bitwise means by which ROT13 is done in the C versions, and a few other versions. Thank you. | |