BT Multi-image Portfolio plugin allows you to add portfolio items in multiple categories. Each item can have multiple images and URLs.

This plugin will add Image, Video gallery items in your WordPress site using shortcodes and custom post.

Responsive Product Gallery

Add a simple and light weighted image gallery. Featured image slider

Masonry Image Gallery is a custom Gutenberg Block built with Gutenberg Native Components. You can easily create an image gallery in Gutenberg Editor with this block.

WP Boootstrap Gallery is the ultra responsive image gallery plugin for WordPress which works seamlessly on every device.

WP Flicker plugin will display your flicker images just like a nice image gallery. Do not need any API key. Shortcode and custom widget available.

Image Gallery - allow you to create lightbox image gallery with caption support and ability to add a slideshow or alternate URL.