Adds "read later" buttons to a site. Can send content to Kindle (additional plugin required), Instapaper, Pocket, and Readability.
Read Later buttons, with a reading time estimate, added to a post using the shortcode. Of course, this is just a demonstration. You can use the shortcode anywhere shortcodes are supported, even adding them to your page templates by calling do_shortcode().
The Read Later Buttons widget in the sidebar.
The widget can be configured to show any combination of services, letting you balance features with space in your sidebar.