Originally Posted by Logseman
Rest sure there is: TitaniumBackup allows to keep apps' backups and sync them with dropbox.
Wouldn't OPDS support work even better? That way we can export our calibre libraries to dropbox, and then download books sorted by tags, author, title, etc. using cool reader? (Aldiko supports this, and I understand that Moon+ does as well, but have not tried it on the latter).