Alto

Alto keeps folders on your computer in sync with your cloud storage, such as
Google Drive, Dropbox, OneDrive, Proton Drive and more.

- True two-way sync. New files, edits and deletions go both ways.
- All your clouds in one place. Connect as many accounts as you like,
across different providers, and sync folders from all of them at once.
- Safe across several computers. Before overwriting or deleting anything,
Alto checks that things haven't changed since it last looked, so a change
made on another computer in the meantime is never lost.
- Shared exclusions. Skip files with .gitignore-style patterns in the
folder's .altoignore. It syncs too, so every computer skips the same
files.