PS/Tk is a portable interface between the Scheme programming language and the Tk Toolkit. Except for a very small portion of code it is written in pure R5RS Scheme.
All you need to write GUI applications in Scheme is Tcl/Tk (and optionally Tile), a supported Scheme implementation, and PS/Tk.
PS/Tk runs on these implementations: Bigloo, (Petite) Chez, Chicken, Gambit, Gauche, Guile, Ikarus, Kawa, Larceny, MzScheme, Scheme 48, Scsh, Stklos.
PS/Tk is distributed under a BSD License.
PS/Tk is based on
Chicken/Tk
by Wolf-Dieter Busch [german].
Chicken/Tk is based on
Scheme_wish
by Sven Hartrumpf.
Copyright (C) 2007 Nils M Holm < nmh @ t3x . org >