Restic - Easy: Doing backups should be a frictionless process, otherwise you are tempted to skip it.

Laoshi - Learn new words with flashcards to master Chinese faster

Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.

Ninchanese - Learn Chinese with Ninchanese and discover how addictive Chinese can be

rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.

YiChi - YiChi helps people Speak Mandarin Chinese