Rclone: rsync for cloud storage

They have a small overview of cloud storage systems at http://rclone.org/overview/. Interesting to see that apart from Google drive, other compared systems do not support duplicate files or objects with same name.

Github repo - https://github.com/ncw/rclone

docs - http://rclone.org/docs/

faqs - http://rclone.org/faq/