Tools

Navi: cheatsheet compatible with cheat.sh (rust)
reveal.js: build html presentation from markdown
netron: viewer for neural network (onnx, h5, keras, pth, pkl)
Jumpdrive: pine64 swiss army knife

Backup

btrbk: backup for btrfs subvolumes
borg: deduplicating archiver with compression and authenticated encryption
rclone: rsync for cloud storage

Rescue tools

Try to recover / retrieve deleted files

photorec
testdisk
diskdrill: Windows only, require license (see pass)
ddrescue
ext4magic: if you have ext3/4 partition