Autoptimize
Autoptimize speeds up your website by optimizing JS, CSS, images (incl. lazy-load), HTML and Google Fonts, asyncing JS, removing emoji cruft and more.
Converts images to more modern formats such as WebP or AVIF during upload.
Lazy loading for images and iframes makes your site load faster and saves bandwidth. Uses no external JS libraries and degrades gracefully for non-js …
Displays placeholders based on an image's dominant color while the image is loading.
Improvements for responsive images in WordPress.
Avatar allows you to create / edit custom avatars for your users right in the Admin Panel. Uses the same directory structure as BuddyPress, so your av …
This plugin lets you use the [gallery] shortcode to show a Bootstrap Carousel.
This plugin allows you to generate a gravatar favicon for your blog and admin logo included Apple touch icon.
Embed direct image links in your comments with an img tag.
The plugin creates an image slideshow as a background to your website.
T&P Gallery Slider for WordPress is an image hover/click gallery as a WordPress plugin.
Bulk upload images to automatically create posts / custom posts with featured images. Updated from mezzaninegold's version
DOM SEO Image automatically adds alt and title attributes to all your images improving traffic from search engines.