(E)2 Photo Gallery
(E)2 Photo Gallery is a open source gallery built with Mootools Javascript Library the compact, modular, Object-Oriented javascript framework. Designed to allow you to upload your photos to a desired folder, tell the (E)2 Photo Gallery what folder to look at and it will automatically load the images using PHP.

noobSlide
Lightweight class written for mootools you can use to create nice slides.

SmoothGallery
Using mootools v1.11, this javascript gallery and slideshow system allows you to have simple and smooth (cross-fading…) image galleries, slideshows, showcases and other cool stuff on your website…

MooFlow
Some of the features:
autosetup graps all images inside a element,
autoresize on changes of window dimensions,
fullscreen option,
scrolling with mouse wheel..

Thumbnoo

iCasousel
iCarousel is an open source (free) javascript tool for creating carousel like widgets.

MooPix
Uh oh, another Javascript slideshow using a popular framework! Fear not — MooPix isn’t a slideshow, it’s a way for you to access your public Flickr photos without doing PHP, Ruby, or Python situps. What you do with it is your perrogative.

Slideshow 2
Slideshow 2! is a javascript class for Mootools 1.2 to stream and animate the presentation of images on your website. This page features some examples of how Slideshow might be used to enhance the presentation of images on your website. Please view the source of this page for usage information.

Slimbox
Slimbox is a 4kb visual clone of the popular Lightbox JS v2.0 by Lokesh Dhakar, written using the ultra compact mootools framework. It was designed to be small, efficient, more convenient and 100% compatible with the original Lightbox v2.