21
Dec
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GoCart is an open source e-commerce application which is focused on offering an easy to use/customize solution and not having a huge number of features but only the important ones.
It can have unlimited categories, tiered categories with any depth, unlimited products-product images-options and can display related items.
The built-in shipping methods include a flat or table rate, USPS, FedEx + UPS and has support for Paypal, Authorize.net and "COD (collect on delivery)" payment methods.

Users can have multiple addresses with the help of an address book and use giftcards or coupons with the system.
A plain admin panel empowers the store owner with features like the ability to configure categories, products, export user + sales data, get sales reports, implement promotions and create/edit content within the site with a simple CMS.
Requirements: PHP & MySQL
19
Dec
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FUEL CMS is a hybrid of a framework and a CMS where you can create your models, views + controllers as usual and only use the CMS part when needed.
It has markItUp! integrated as the WYSIWYG editor and enables editing web pages inline in real-time.

The application has a simple interface where users of any level can easily use and it can be controlled by multiple users with a permission-based system.
There are also various exciting features offered like built-in site-wide HTML validation, a cronjob manager to create schedule tasks automatically and more.
Requirements: PHP 5+, MySQL 4+
26
Sep
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GalleryCMS is an open source CMS application that is specially built for managing image galleries.
The application does not offer a front-end to the galleries. It enables you to create galleries, add images with ease & generates a XML file which can be used for creating the gallery.

The format of the XML file created can be customized which makes GalleryCMS ideal for using with the Flash & JavaScript galleries around that has no backends.
It is built with the CodeIgniter framework & can be installed very quickly.
Requirements: PHP (GD library enabled), Database (compatible with most)
20
Jul
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For every e-commerce website, web application or even a standard website, knowledgebases are very useful systems for helping users to find answers themselves.
68KB is a free knowledgebase application that is built with PHP & MySQL & can be themed to match the look of any website.

It has support for unlimited categories/sub-categories & SEO friendly URLs. Also, features like an "integrated glossary", "popular & new articles" makes browsing much easier.
With the help of an admin interface, it is possible to manage the system easily, view the stats, search logs & more.
68KB is multilingual & built with the CodeIgniter framework.
Requirements: PHP 4.3.2+, MySQL 3.23+
Compatibility: All Major Browsers
25
Jan
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dfGallery 2.0, the new version of the popular free Flash image gallery, is totally updated & offers a beautiful experience.
The gallery application has lots of features but still easy to use & have a slick look.

The gallery has integration support with Flickr & Picasa. It can get all Flickr albums under a user with the API key or any Picasa albums via the URL of the album.
dfGallery 2 can display multiple albums that can be switched via the interface. Images can be manually browsed or as a slideshow.
You have the full control over the gallery with an Ajaxed admin panel that supports multiple uploads & built on CodeIgniter.
Other features
- Theming support (change the layout and the presentation of the gallery)
- Skinning support
- Customizable background music
- Fullscreen feature
Click here for a demo of the gallery.
Requirements: PHP