Are there any ways to access iCloud with Ubuntu?

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http://askubuntu.com – I have various Apple products which sync with iCloud. Are there any ways to access iCloud documents with Ubuntu apart from the web-based access at https://www.icloud.com/? The ideal option would be a daemon that syncs with iCloud in a similar way to how Dropbox does. However, a programmable API or GUI-based solution would be good too. Essentially I'm looking to investigate the options; I appreciate they are likely to be reverse-engineered and not 100% official or supported. (HowTos)