Let you add media files into your media library without having to upload them.

shawfactor

ricardosimoes

LH Add Media From Url

Upload files from an url to wordpress media library, either enter file urls in an onsite input box or click a bookmarklet.

LH Copy Media File

Allows you to create duplicate images in the media library.

LH Browser Shots

Add screenshots of remote wesbites directly to the wordpress media library, either enter the site url in an onsite input box or click a bookmarklet.

scribu

mustela

Press This Reloaded

Press This, using the regular Add New Post screen

conlabz GmbH

WP Bookmarks

WP Bookmarks adds a special post type to your WordPress installation, that you can use for bookmarking your favorite websites.

Alex Moss

Pocket Read it Later Button

This plugin lets you easily add a Pocket Read it Later button to your WordPress blog via a shortcode.

dalziel

Link This Bookmarklet

Provides the ability to have a bookmarklet on your browser that will let you add any page as a link on your blog.

Matthias Pfefferle

OExchange

Adds OExchange and Web Intents support to WordPress

damies.softs

Hierarchical Bookmark System

Hierarchical Bookmark System avails an eye catching interface to save and categorize bookmarks in a hierarchical fashion.

singpolyma

Friend Bookmarklet

Generates a bookmarklet that makes it easier to add friends to the WordPress links system.

LH Nominate This

Allows users to republish readable extracts of other webpages on their own site.

wilcosky

bookmark wp

Bookmark/share webpages by clicking a special bookmark in your browser called a bookmarklet. Contribute at: https://github.

LordPretender

<p>This plugin allow you to add files into your media library without having to upload them. So, you will be able to share, for example, your files into your Google Drive.<br />
This also save you steps to download the image to local computer and upload again to your own WordPress.</p>
<h4>Features</h4>
<ul>
<li>Automatically downloads and adds the file to the media library.</li>
<li>After the uploading is successful, you are redirected to the edit screen</li>
<li>A new dropdown list is available in the media library to let you display only uploaded files, not uploaded files, …</li>
</ul>


Add Media from URL

large chunks of code taken from the much better original here:

https://en-au.wordpress.org/plugins/lh-add-media-from-url/

IMO it unethical to use this plugin

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