Pixelpost is an open source photoblog application with powerful image gallery features.

It can be used only as an image gallery or a website of a designer, photographer and so.. easily.

Pixelpost lets the users browse the image archive, view images in detail and comment to them.

Having an active community, you can find 200+ plugins & templates for the application.

This photoblog application has also RSS & multilanguage support.

Click to see a nice photoblog created with Pixelpost.

(E)2 is a good looking photo gallery built with MooTools JavaScript Framework.

By default, (E)2 has 4 themes which can be switched-between easily. It has an auto-loading thumbnail viewer which can be hidden too.

This photo gallery requires PHP to run and does not need any database.

In the near future (E)2 gallery will have a "pro" version with more features and you will be informed of it via WebresoucesDepot for sure.

Andrew Berg has created a nice looking, open source flash gallery named Flash Photo Browser.

Flash Photo Browser is used by uploading thumbnails and the original images in the related folders with same names and after that, the application lets you browse the images with a nice effect.

It uses the Flash tweening prototypes, blurred rect prototype, draw rect prototype and requires PHP to run.

Besides the standard look, you can also switch to the thumbnail view with a click.

Revolver is a fast image rotation engine built with PHP.

It is just like a slideshow application with features like:

• Play and stop controls
• No database requirement
• RSS support
• Pre-dating images for future publishing
• Produces valid XHTML code
• Different background colors for every image

Revolver is managed with uploading the image files according to the special name format and there is no need for an administraion interface.

You can use it to create a portfolio website, slideshow, sketchbook or a simple image gallery.

Phormer is an open source PHP photo gallery that helps you store, organize and trim your photos online.

This photo gallery application uses XML for all the data including photos, comments and settings and does not require MySQL.

With an easy web-based install, Phormer has features like:

• Categorization (by date, subject..)
• Standards-based XHTML output
• Making any content private
• Photos can be set to be called from another server
• Ajax upload manager
• Ability to create a thumb image of your own selection
• 10+ themes
• RSS feeds
• Advanced commenting
• EXIF metadata reader
• Statistics
• Mass upload from a ZIP file
• Slideshow

Ajax-S is an ajaxed, nice looking and easy to use slideshow application.

It is similar to Eric Meyer’s S5 (another slideshow application) except a major difference, Ajax-S calls the data from a XML file rather than HTML which makes the application more portable and user-friendly for anyone without HTML knowledge.

Ajax-S accepts HTML and XHTML natively (no need for escaping any characters). Navigation of the application is pretty simple; mouse clicks, keyboard navigation bottons or the drop-down list in the application are the choices. And, we can get a printable-version with a click.

ProtoFlow is an open source content viewing application built with Prototype & script.aculo.us which functions similar to the famous iTunes Cover Flow.

You can browse through the content (it supports all the HTML elements) with mouse clicks or a JavaScript slider.

It is mentioned that the application may have more features in the future like auto-play and image reflection.

Radiant is an open source content management system built with Ruby on Rails. It is built for small developer teams other than the end-users as it requires programming knowledge.

With a very simple interface, Radiant offers flexibility when creating the design & content. 3 parts: pages, snippets (like PHP includes) and layouts create the core of the system.

It offers a flexible site structure where pages can be arranged according to any hierarcy.

Radiant has a custom template language named Radius (similar to HTML) which can be used inside pages, layouts to include content from other pages or display content conditionally & more. It also has an intelligent caching mechanism which helps serving pages faster while ensuring the content is up-to-date.

TiltViewer is a free 3D Flash image viewer application with an impressive interface.

The application responds to the mouse movements and creates a full 3D effect with new image sets falling, old ones disappearing, zooming an image and flipping it to see the details.

Images can be added to the gallery from a XML file or a flickr account.

TiltViewer comes with 2 versions. A free version with a "TiltViewer" link and a Pro version which is paid with no links and more customization options.

P.S. This flash gallery is built with Away3D,  a realtime 3D engine for Flash.

XML Flash galleries are very easy to use & update. When there is a flickr support too, than it is great as it will be totally automated.

Polaroid Gallery is a free flash gallery with splash effect that can get the image data from an XML file or a flickr account.

Pictures is automatically scaled, centered and smoothed when they are loaded. Splash loading effect is totally random, this makes the look of the gallery different every time it is loaded. Images can be dragged & dropped anywhere in the gallery.

Besides the image gallery SWF file, FLA source can be downloaded too.