Top 5 Shell rescue Projects

archuseriso

3 204 7.8 Shell

Toolkit for building bootable disk images of Arch Linux and for installing Arch Linux on USB disk or thumb drive.

Project mention: Is there a recommended way of syncing installed packages and configs? Portable user homes? | /r/archlinux | 2023-09-14

see the ArchTitus project from ChrisTitus Tech https://github.com/ChrisTitusTech/ArchTitus . basically a git repo with everything. Just git clone and install. Or use something link archuseriso https://github.com/laurent85v/archuseriso and make your own iso.
systemrescue-zfs

4 90 6.5 Shell

A fork of SystemRescue (formerly SystemRescueCd) with ZFS built-in and serial console access enabled for all boot options. Download bootable ISOs from the releases page.
InfluxDB

www.influxdata.com
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gary-os

7 85 7.8 Shell

GaryOS is an entire GNU/Linux system in a single bootable file

Project mention: GaryOS | news.ycombinator.com | 2023-07-14

The https://github.com/garybgenett/gary-os#licensing section is interesting.
ansible-freebsd-install-on-zfs-lite

1 7 5.7 Shell

FreeBSD. Installing a FreeBSD system on the root with ZFS from MfsBSD running in rescue mode.
ansible-mfsbsd-install-via-linux-lite

1 7 0.0 Shell

MfsBSD. Installing and booting MfsBSD from running Linux, via grub.
WorkOS

workos.com
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The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-09-14.