VidoopCAPTCHA is a free verification solution that works image-based which is unusual compared to the widely-used text-based ones.

It aims to be a more user-friendly solution as text-based captchas can sometimes be so hard to read for humans besides bots.

VidoopCaptcha is a hosted service & have plugins for WordPress, Ruby on Rails, and Drupal. Also, there are libraries for programming languages such as PHP, Python, and .NET.

It offers some customization options like category, number of grid squares, color & grid size. For a demo of this security resource, click here.

Open Atrium is an open source web application for creating an intranet where co-workers/teams can collaborate easily.

It is built on the Drupal framework & has modules like:

• blogs for each group
• event calendar which can import feeds from iCal & others
• documents, to store, collaborate & see revisions
• Twitter-like shoutbox for sharing any info
• case tracker which is a complete ticketing system to manage projects & assign tasks
• group dashboard to see what’s going on

Open Atrium can be extended with new features by creating new modules.

The application is multilingual & requires PHP & MySQL to run (like Drupal).

Allowing users to invite their contacts from other networks or e-mail providers is a popular method used in social networks & web applications.

OpenInviter is an open source PHP class, written in PHP5, for importing contacts from most of the well-known e-mail providers & social networks.

Such an invite feature is great, specially when presented as optional, to gain new users/visitors to any service.

There are already ready to use integrations for:

• Wordpress
• Drupal
• Joomla
• phpBB & more.

OpenInviter supports:

• Gmail
• Windows Live
• Yahoo
• Mail.com
• Facebook
• Friendster
• hi5
• Linkedin
• Twitter
• Myspace & more..

Magic Toolbox is a set of JavaScript image effect solutions.

These include zoom, magnify and thumb features.

These JavaScript solutions do not rely on JavaScript framework, they are well-documented and some have installation instructions for other like Joomla, Drupal, osCommerce & more.

They are free only for non-commercial use and need a license for commercial websites.

Freeway is a feature-rich open source e-commerce platform which lets you sell services, subscriptions or events besides the standard products.

This e-commerce application is built with PHP and uses MySQL as the database.

A nice feature of Freeway is; it helps you promote your products with a powerful discount – campaign module which lets you create "get x and y is free" or "get 3 and 1 is free" type price breaks. And also, an included affiliate system lets anyone refer you and get a commission on sales.

Some other features of Freeway:

• Supports most of the popular payment systems
• Multilingual
• Newsletter management
• SEO friendly URLs
• Role-based admin
• Sales, stock, shipping and similar reports
• Ticket support feature
• SMS marketing
• And much more..

Freeway can be integrated to Joomla with the ready to use modules and modules for Typo3 and Drupal is on the way.

Übercart is an e-commerce suite developed for Drupal. With the end user in mind, focusing on usability at store configuration, product – catalog creation and order administration, Übercart is a simple yet powerful shopping cart solution.

Complete integration with Drupal makes Übercart stronger as there many modules, templates for Drupal. For example, you can easily add a forum, event system and even a digg-like voting system to your e-commerce website besides the products. Expansion limits are so wide.

Übercart is great for:

• Selling physical goods from any sized product catalog.
• Selling file downloads.
• Selling site access for members only websites, including automatic expiration and renewal of user access.

This free shopping cart for Drupal is integrated with many payment gateways like Cyber Source, Authorize.net, PayPal and shipping solutions like UPS, FedEx and USPS.

Übercart also provides an API to developers for integration with other codes.

Drupal, which is one of the most powerful & free content management system has a new module named Drigg for creating Digg-like websites.

Unlike other Drupal-based solutions, Drigg only needs:

- VotingAPI — a powerful Voting API available for Drupal.
- A voting form based on the VotingAPI. The forms of choice are provided by Extra Voting Forms.
- The User Karma module.

Bitnami can be called as an installation framework that makes it easier than ever to try the latest and greatest versions of popular open source software. Just install, play with the software, and uninstall when you are done. The stacks are pre-configured, self contained, and will not interfere with the rest of your system.

What is a stack?

BitNami stacks make it incredibly easy to install your favorite open source software. Application stacks include an open source application and all the dependencies necessary to run it, such as Apache, MySQL and PHP or Ruby. All you need to do is download the Stack, provide a few pieces of information when prompted by the installation wizard, and that’s it. By the time you click ‘finish’, your new application will be ready to run.

Softwares supported (for now, new applications are added frequently that are decided with the community polls):

 Infrastructure
- LAMPStack
- MAMPStack
- RubyStack
- WAMPStack
Blog
- Roller
- WordPress
Bug-Tracking
- Mantis
- Redmine
- Trac
CMS
- Alfresco
- Drupal
- Joomla!
- KnowledgeTree
ECM
- Alfresco
- KnowledgeTree
Forum
- phpBB
Poll Management
- Opina
Portal Server
- Liferay
Wiki
- DokuWiki
- MediaWiki
eLearning
- Moodle