WordPress.org

Really Simple Gallery Widget adds a widget to display images from the Media Library, no extra uploading or creating custom post types required. You can choose to show images from a specific post/page or the entire media library, and/or show only images attached to the post/page currently being viewed. Especially helpful if you create photo gallery pages using the built-in WordPress media library and just want to be able to display those images in a widget area.

Features

• Add as many widgets as you want, wherever you want
• Display images from a specific post/page
• Display images from the entire Media Library
• Display images from the post/page currently being viewed
• Select a number of images
• Select any registered size in WordPress
• Display the images in ascending, descending, or random order
• Show or hide captions
• Link the images to the original file, post, anchor in the post, attachment page, or nothing. NOTE: If the image is not attached to a post, the file link will be used instead.
• Add a prefix to the link and image title (appears as a tooltip)
• Use a rel attribute for the link - great for lightboxes