Unsplash WP Plugin WordPress, Download, Install
One click uploads of unsplash.com stock photos directly to your media library....
Remote Media Libraries Plugin WordPress, Download, Install
Remote Media Libraries (RML) gives you access to third parties media libraries directly from the WordPress Media Library....
LH Add Media From Url Plugin WordPress, Download, Install
Upload files from an url to wordpress media library, either enter file urls in an onsite input box or click a bookmarklet....