Unmaintained implementations Antero Mejr (13 May 2024 14:25 UTC)
Re: Unmaintained implementations Arthur A. Gleckler (13 May 2024 14:39 UTC)
Re: Unmaintained implementations Lassi Kortela (13 May 2024 15:17 UTC)
Re: Unmaintained implementations Lassi Kortela (13 May 2024 17:46 UTC)
Re: Unmaintained implementations Antero Mejr (13 May 2024 18:05 UTC)
Categorizing and describing implementations Lassi Kortela (13 May 2024 18:24 UTC)
Re: Categorizing and describing implementations Jakub T. Jankiewicz (13 May 2024 20:16 UTC)
Re: Categorizing and describing implementations Arthur A. Gleckler (13 May 2024 20:23 UTC)
Re: Categorizing and describing implementations Lassi Kortela (13 May 2024 20:37 UTC)
Re: Categorizing and describing implementations Arthur A. Gleckler (13 May 2024 20:39 UTC)
Re: Categorizing and describing implementations Jakub T. Jankiewicz (13 May 2024 21:19 UTC)
Re: Categorizing and describing implementations Arthur A. Gleckler (13 May 2024 21:26 UTC)
Containers Lassi Kortela (13 May 2024 21:37 UTC)
Re: Containers Arthur A. Gleckler (13 May 2024 21:41 UTC)
Re: Categorizing and describing implementations John Cowan (13 May 2024 21:51 UTC)
Re: Categorizing and describing implementations Stephen De Gabrielle (14 May 2024 08:23 UTC)
Re: Categorizing and describing implementations Jakub T. Jankiewicz (14 May 2024 11:55 UTC)
Snap and Lisp Lassi Kortela (14 May 2024 12:15 UTC)
Re: Snap and Lisp Stephen De Gabrielle (14 May 2024 12:45 UTC)
Re: Snap and Lisp Lassi Kortela (14 May 2024 13:33 UTC)
Re: Categorizing and describing implementations Marc Feeley (14 May 2024 12:48 UTC)
Re: Categorizing and describing implementations Stephen De Gabrielle (14 May 2024 13:09 UTC)
Re: Categorizing and describing implementations Marc Feeley (14 May 2024 13:29 UTC)
Re: Categorizing and describing implementations Jakub T. Jankiewicz (14 May 2024 14:03 UTC)
Re: Categorizing and describing implementations Stephen De Gabrielle (14 May 2024 17:45 UTC)
Re: Categorizing and describing implementations Lassi Kortela (19 May 2024 13:47 UTC)
Re: Categorizing and describing implementations Antero Mejr (20 May 2024 14:03 UTC)
Re: Categorizing and describing implementations Arthur A. Gleckler (20 May 2024 14:24 UTC)
Definition of "Scheme" Lassi Kortela (14 May 2024 13:21 UTC)
Re: Categorizing and describing implementations Jakub T. Jankiewicz (14 May 2024 13:53 UTC)
Re: Unmaintained implementations Arthur A. Gleckler (13 May 2024 19:12 UTC)
Re: Unmaintained implementations Jakub T. Jankiewicz (13 May 2024 20:40 UTC)
Re: Unmaintained implementations Arthur A. Gleckler (13 May 2024 20:43 UTC)
Re: Unmaintained implementations Lassi Kortela (13 May 2024 20:49 UTC)
Re: Unmaintained implementations Arthur A. Gleckler (13 May 2024 20:55 UTC)
Re: Unmaintained implementations Lassi Kortela (13 May 2024 21:07 UTC)
Re: Unmaintained implementations Antero Mejr (13 May 2024 21:18 UTC)
Metadata files Lassi Kortela (13 May 2024 21:34 UTC)
Re: Metadata files Antero Mejr (13 May 2024 21:41 UTC)

Re: Unmaintained implementations Lassi Kortela 13 May 2024 17:45 UTC

Here's the current list of maintained implementations as far as I can tell:

Bigloo
Chez Scheme
Chibi Scheme
CHICKEN
Cyclone
Gambit
Gauche
Gerbil
Guile
JazzScheme
IronScheme
Kawa
Loko
MIT Scheme
Mosh
Racket
s7
Sagittarius
SCM
STKlos
TinyScheme
Ypsilon

There are some new upstarts on GitHub and GutLab that I'm not familiar with.