CDN Tools is a plugin designed to help you drastically speed up your blog's load time by loading data onto a content distribution network (CDN).
Plugin Tag: sideload
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Dropbox Photo Sideloader
Adds a new tab to the Add media screen, allowing you to pull images from Dropbox into WordPress.
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Cache Images
Goes through your posts and gives you the option to cache all hotlinked images from a domain locally in your upload folder