Several people have contributed to af's development. Here's my chance to thank them for their efforts, and for an attempt at a moment of glory.
Malc Arnold conceived af, did the initial design work, wrote almost all of the code, and argued passionately in defence of the interface.
Kay Dekker did a vast amount of design work, discussing and arguing about features we should support and how the interface should work. More af features than I can readily recall were originally Kay's idea. He also wrote the manual pages and the first draft of the user manual, and showed great restraint when struggling with some of the less stable versions of af.
Ian "Vato" Dickinson actually suggested turning af into a full-featured mailer, and had a wealth of suggestions for features, some of which I've actually implemented. He also wrote the first draught of the POP3 and SMTP support code.
Andrew "Vic" Fry is now working on an X Windows interface for af (don't hold your breath). He has also ported and tested several versions of af. Most importantly, he has contributed insights about the af interface, and enough encouragement and coffee to keep me going.
Justin Murdock, Dave Berry, Iain Bowen, and Onno van der Linden have reported many bugs and suggestions for improving af.
Emma Kemm and Iain Bowen proofread the manuals and supplied more much-needed moral support.
Richard Stallman wrote the eleventh edition of the GNU Emacs manual, from which many parts of the af user manual have been derived. Thanks to the Free Software Foundation for permission to distribute this manual as a "derived work". Note that this does not imply any endorsement of af by the Free Software Foundation.