add ownerboot to the other.md page

Signed-off-by: Leah Rowe <leah@libreboot.org>

site/other.md

@@ -178,6 +178,34 @@ With MrChromebox's guidance, you can have a completely up to date UEFI firmware
 on your machine, and get good use out of your Chromebook for many more years,
 with regular security updates.
 
+Ownerboot
+---------
+
+Git repository: <https://codeberg.org/amjoseph/ownerboot>
+
+Ownerboot is an interesting one; it uses the Nix package manager to compile
+coreboot images, with a Linux-based payload on supported x86 and ARM64
+devices. Similar conceptually to Heads, but with a *much* cleaner build system
+design.
+
+It comes with the LVM2 and cryptsetup sources included in builds by default, so
+it can easily be used to create a fully encrypted system, much like Canoeboot's
+own [hardened GRUB](docs/gnulinux/grub_hardening.md) setup.
+
+Since it uses Nix, reproducible builds are quite feasible and this is one of
+the project's primary goals. Interestingly enough, it also supports both the
+gru kevin chromebook and the ASUS KGPE-D16 boards, which Canoeboot supports but
+Canoeboot uses U-Boot and a combination of SeaBIOS/GRUB, respectively, on these
+boards.
+
+Ownerboot's build system can also cross compile everything, so it's quite
+portable across various host CPUs. It also extends coreboot's normal/fallback
+payload scheme. See: <https://codeberg.org/amjoseph/ownerboot/src/branch/master/doc/fallback.md>
+
+All of this combined makes for a highly configurable boot setup, and the Linux
+payload in flash (using kexec to boot another kernel) is highly flexible,
+offering many opportunities for security hardening (like Heads).
+
 Skulls
 ------