What i like most about Fluid Gallery (using 2.6.7 now) is the fact that it's highly customizable via custom template…
The 'Fluid Gallery' is a 'Responsive' 'Retina' ready image gallery that displays images from filesets and are displayed as a series of thumbnails that pop up in a 'Fancybox'.
Images are automatically cropped, so you can mix landscape and portrait together.
Now uses a lazy load script for large galleries.
When clicked, thumbnails will zoom in to the center of your browser window and show a smooth fade transition.
Image Descriptions and links, if used, are shown on the thumbnails and in the 'Fancybox' pop up window.
NEW templates added.
Supersize - single thumbnail (customer request)
Newly requested template, Image Links,no pop up or titles, just links to any internal page. Includes a little bit of CSS animation.
Retina - To help with clearer images for 'Retina' displays this template requires images twice the normal size. On the demo site the images are 1600 x 1200 px, but display at 800 x 600 px.
Thumbnail nav - Lightbox images with a set of thumbnails below. Click thumbs or use keyboard to navigate through images.
NOTE: Only one of these templates can be used on page.
Right to Left - Descriptions and links flow from right to left for languages such as Arabic and Hebrew.
Images are resized, cropped and optimised using a FREE editor, Mac & Windows versions available: PhotoScape
Set up instructions on Documentation page.