simple-image-gallery

Simple Image Gallery (by JoomlaWorks) is truly the simplest and most effective way to add image galleries into your Joomla content and a classic must-have extension for any Joomla based website. Maintained by joomlaworks on GitHub, where it has earned 8 stars from the community.

It's actively developed around image-gallery, joomla, joomla-plugin, and is a solid reference for anyone building with these tools.