This is Techno-Blogg's list of the most beautiful free Javascript and Flash gallery software.
Note: listed in no particular order.
JAVASCRIPT
GalleriaDemo
Galleria is a javascript image gallery written in jQuery. It loads the images one by one from an unordered list and displays thumbnails when each image is loaded. It will create thumbnails for you if you choose so, scaled or unscaled, centered and cropped inside a fixed thumbnail box defined by CSS.
LightWindow
(E)2 Photo GalleryDemo
Spry
Imago Demo
jQuery slideViewer
minishowcaseDemo
AJAX Image Gallery powered by Slideflow
Lightweight Image Gallery with ThumbnailsDemo
Live Pipe PhotoFolderDemo
JaSDemo
JaS is a highly customizable JavaScript library for easily turning your images into a collection viewable as a slideshow, and with fading effects, if desired. It also supports automatic thumbnail creation and tagging of images, so the viewers can find the exact images they're looking for. You can use it any way you like in your own web site, and adapt it to your specific needs.
MooFlow
MooFlow is a Javascript based Gallery looks like Apple's iTunes or Finders CoverFlow.
xImgGallery
mooCicle Demo
Lightview
Lightview was built to change the way you overlay content on a website.
Live Thumbnail
Highslide
Couloir.org: Resizing, Fading Slideshow
JonDesign's SmoothGallery
FLASH
Flash Gallery Demo
Flash Gallery is a FREE, simple photo gallery built in Macromedia Flash 2004, that uses XML files to store the information about which images to display. The gallery is easy to configure and update since you need to change only the XML file.
dfGallery
SimpleViewer
SimpleViewer is a free, customizable Flash image viewing application. There`s also a nice administration panel available.
Flash Photo StackDemo
Flash Photo Stack is a simple Flash template that enables you to click through a stack of your favourite photographs.
AutoViewerDemo
AutoViewer is a free, customizable Flash image viewer. AutoViewer is designed to display a linear sequence of images and captions.
FlashPageFlipDemo
Flash Carousel Slideshow Demo
Art Flash Gallery
Art Flash Gallery is based on Adobe Flash (cs3) technology. It will help you easily post any images on your site in a matter of minutes. The gallery will organically blend with any design thanks to multiple appearance settings.
Flash Image Gallery - FIGDemo
The FIG is a gallery application that can be used by anyone to display multiple galleries of photos, artwork, or other pictures with descriptions. It requires no server-side language and will run on any web host. It is idealy suited for artists with online galleries, but can be used by anyone.
TiltViewerDemo
TiltViewer is a free, customizable 3D Flash image viewing application.
Photo ViewerDemo
The Photo Viewer uses both Flash and XML. All data is stored within an XML file making it easy to make modifications and update.
FlashGalleryGeneratorDemo
Agile Gallery
The Flash version of AgileGallery is a free Flash photo gallery that rips through the XML output from Picasa and generates the paging and thumbnails and displays the full sized photos along with any description entered in Picasa. It also includes a slideshow feature.