Jose A. Ortega Ruiz <jao@gnu.org> designed and implemented Geiser and
is its active maintainer. For more boring details about him, see
<http://hacks-galore.org/jao>.

Contributors:

Michael Wilber implemented the initial Racket image support modules.
Jonas Rodrigues implemented the initial version of geiser-repl-clear-buffer.
Ray Racine implemented geiser-edit-insert-lambda.

See also the files THANKS and ChangeLog.