Snow is a place to share Scheme programs, libraries and data. Currently we host only R7RS libraries, though we may expand to more dialects in the future.
Found via a link on https://weinholt.se/articles/cond-expand-and-ifdef/
I tried to run the trivial program
 (define ! (n) (if (< n 2) 1 (* n (! (1- n)))))
 (display (! 10))
on http://chibi-scheme.appspot.com/, but got an error message about not being able to enlarge memory arrays.

While this blog article is about a new feature of the Scheme-based Guix Linux package manager, it contans the following interesting observation about erroneous shell settings: "it’s not uncommon for the shell to mess up with the whole environment. Why? Because, contrary to documented practice, it’s quite common for users to define or override environment variables in the startup files of non-login shells, ~/.bashrc for Bash, ~/.zshrc for Zsh. Instead, environment variable definitions should go to the startup file of login shells—~/.bash_profile, ~/.profile, or similar. But let’s face it: it’s a subtle distinction that few of us know or care about."

The site uses weblorg.
Other articles such as
https://muto.ca/posts/clean-password-management.html
https://muto.ca/posts/painting-in-guile-with-opengl.html
are interesting too.

Interesting blog written in org-mode, using https://github.com/bastibe/org-static-blog, written by Bastian Bechtold https://bastibe.de/
Some highlights:
https://jao.io/blog/2020-02-26-literate-programming.html literate programming
https://jao.io/blog/2020-02-23-signel.html, a barebones signal chat on top of signal-cli, written in literate style
https://jao.io/blog/2006-03-17-programmers-go-bananas.html category theory
https://jao.io/blog/2020-05-01-dancers-at-the-end-of-time.html sounds like an interesting book.
https://jao.io/blog/2006-07-06-geometrically-speaking.html geometric proofs, Kindergarten Quantum Mechanics
https://jao.io/blog/2020-05-04-observatory.html Mozilla Observatory to check a website's security
https://jao.io/blog/2022-06-19-simple-note-taking.html simple note taking

Loko Scheme, an optimizing R6RS Scheme compiler!

- Batteries on the side (Akku.scm)
- Only available for Linux/amd64, NetBSD/amd64 and bare metal amd64
- New, untested, obnoxiously Free Software
- Barely a REPL & slim documentation
- The worst of Scheme and Lisp

TinyScheme is a lightweight Scheme interpreter that implements as large a subset of R5RS as was possible without getting very large and complicated. It is meant to be used as an embedded scripting interpreter for other programs. As such, it does not offer IDEs or extensive toolkits although it does sport a small top-level loop, included conditionally. A lot of functionality in TinyScheme is included conditionally, to allow developers freedom in balancing features and footprint.

GNU Mes brings a Reduced Binary Seed bootstrap to GuixSD and potentially to any other interested GNU/Linux distribution, and aims to help create a full source bootstrap as part of the bootstrappable builds effort.

It consists of a mutual self-hosting Scheme interpreter written in ~5,000 LOC of simple C and a Nyacc-based C compiler written in Scheme. This mes.c is being simplified to be transpiled by M2-Planet.
https://github.com/oriansj/M2-Planet

The Scheme interpreter (mes.c) has a Garbage Collector, a library of loadable Scheme modules– notably Dominique Boucher's LALR, Pre-R6RS portable syntax-case with R7RS ellipsis, Matt Wette's Nyacc –and test suite just barely enough to support a simple REPL and simple C-compiler: MesCC.
https://github.com/oriansj/mescc-tools

Mes+MesCC can compile an only lightly patched TinyCC that is self-hosting. Using this tcc and the Mes C library we now have a Reduced Binary Seed bootstrap for the gnutools triplet: glibc-2.2.5, binutils-2.20.1, gcc-2.95.3. This is enough to bootstrap GuixSD for i686-linux and x8664-linux.

Mes is inspired by The Maxwell Equations of Software: LISP-1.5 – John McCarthy page 13, GNU Guix's source/binary packaging transparency and Jeremiah Orians's stage0 ~500 byte self-hosting hex assembler.

GNU Mes is free software, it is distributed under the terms of the GNU General Public Licence version 3 or later. See the file COPYING.

Installing the Guix package manager on Android, requires root access.
Note that "Guix complains when /gnu or /gnu/store is a symlink".

The second edition of the book Structure and Interpretation of
Computer Programs (SICP) in info format. The HTML version can be found on https://mitpress.mit.edu/sites/default/files/sicp/index.html