blocksync-fast : Fast block device sync with digest, designed to improve block-based backups. ( https://github.com/nethappen/blocksync-fast/ )
btrfs-backup : A program for backup and restoration of btrfs subvolumes ( https://github.com/d-e-s-o/btrfs-backup )
grub-btrfs : Improves Grub by adding btrfs snapshots to the Grub menu. ( https://github.com/Antynea/grub-btrfs )
kopia : Kopia - Fast And Secure Open-Source Backup ( https://github.com/kopia/kopia )
kopia-ui-bin : Kopia - Fast And Secure Open-Source Backup (Electron UI) ( https://github.com/kopia/kopia )
pika-backup : Keep your data safe ( https://gitlab.gnome.org/World/pika-backup )
portage-snapper : Snapper snapshots around Portage transactions, snap-pac style ( https://github.com/ursm/portage-snapper )
restic-browser : A GUI to browse and restore from restic backup repositories ( https://github.com/emuell/restic-browser )
snapper-rollback : Rollback to a snapper btrfs snapshot using the flat subvolume layout ( https://github.com/jrabinow/snapper-rollback )
timeshift : A system restore utility for Linux ( https://github.com/linuxmint/timeshift )
timeshift-autosnap : Automatically creates a timeshift-snapshot when executed ( https://gitlab.com/gobonja/timeshift-autosnap )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a guru
For Paludis use this rsync : rsync://gentoo.zugaina.org/guru-portage
If you have a problem : ycarus(-at-)zugaina.org