Tilck is an educational monolithic x86 kernel designed to be Linux-compatible at binary level. Project's small-scale and simple design makes it the perfect playground for playing in kernel mode while retaining the ability to compare how the very same usermode bits run on the Linux kernel as well. That's a unique feature in the realm of educational kernels. Because of that, building a program for Tilck requires just a i686-musl toolchain from bootlin.com.

Found on Leah Neukirchen's blog https://leahneukirchen.org/trivium/2021-08-15

Kiss Linux™ is a meta-distribution for the x86_64 architecture with a focus on
simplicity, sustainability and user freedom. The project was created by
Dylan Araps who also acts as its sole developer and BDFL [0].

The distribution is designed to be maintainable by a single person and to this
end has no infrastructure, backend or monetary running costs. Further, all
installations of KISS contain everything needed to continue its development.

Found via https://github.com/a-schaefers/systemE, an replacement for systemd

Found on https://ssd.eff.org/en/module/how-delete-your-data-securely-linux

It is not complete yet, the author states "This is a work in progress and you may consider this increment as a Minimum viable product (MVP) version."
Last update: 2018-12-09 18:93:01 UTC
The official documentation can be found on https://www.kernel.org/doc/Documentation/sysctl/

FUSE-based filesystem capable of both reading and writing v6 disk images.
https://github.com/jaylogue/retro-fuse

Timeshift – free and open source software for creating snapshots of the file system

Blog about cryptography, hash functions and more

Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.