Support for the Fossil version control system https://fossil-scm.org/home/doc/trunk/www/index.wiki for Emacs' VC version control abstraction.

An open source implementation of SCCS, found via https://minnie.tuhs.org/pipermail/tuhs/2022-June/025898.html
The comparison to RCS on http://sccs.sourceforge.net/sccs_vs_rcs.html appears to be one-sided, but then I am probably biased towards RCS, which was the first version control software I have used.
http://sccs.sourceforge.net/sccs_invention.html sounds like an interesting read.
The last message on the mailing list https://sourceforge.net/p/sccs/mailman/sccs-devel/?viewmonth=201510 I found had been written 2015-10.
According to https://de.wikipedia.org/wiki/J%C3%B6rg_Schilling, the author Jörg Schilling passed away on 2021-10-10.
TODO: find out the license

Game of Trees (Got) is a version control system which prioritizes ease of use and simplicity over flexibility.

Got is still under development; it is being developed on OpenBSD and its main target audience are OpenBSD developers.

Got uses Git repositories to store versioned data. Git can be used for any functionality which has not yet been implemented in Got. It will always remain possible to work with both Got and Git on the same repository.

Pre-commit is a multi-language package manager for pre-commit hooks. You specify a list of hooks you want and pre-commit manages the installation and execution of any hook written in any language before every commit. pre-commit is specifically designed to not require root access.

Tools to manage configuration files in $HOME. Found via https://ubuntu.com/blog/feeling-at-home-in-a-lxd-container
where https://www.chezmoi.io/ is recommended.

The are working to archive all of Bitbucket Mercurial content before Atlassian delete it all.
The article "Not everything is UTF-8" 2020-06-05 (no URL yet, as of 2020-06-09 it can be found on https://octobus.net/blog) is interesting too.

The link points to survey results, those below are about specific ways to manage dotfiles.
  1. https://www.atlassian.com/git/tutorials/dotfiles
  2. https://news.ycombinator.com/item?id=11070797 needs more exploration
  3. https://thoughtbot.com/blog/rcm-for-rc-files-in-dotfiles-repos
  4. https://blog.tfnico.com/2014/03/managing-dot-files-with-vcsh-and-myrepos.html found in (2)

Manage multiple working trees attached to the same repository.
Found via https://fossil-scm.org/home/doc/trunk/www/fossil-v-git.wiki section "One vs. Many Check-outs per Repository"

Git for Windows focuses on offering a lightweight, native set of tools that bring the full feature set of the Git SCM to Windows while providing appropriate user interfaces for experienced Git users and novices alike.
Includes a bash emulation.