The application is built with Ruby on Rails and, besides the open source version, has a hosted version too.

Users can create an unlimited number of projects & tasks, assign them to their colleagues, share messages, files & much more.

Users can start a conversation instantly, create pages to store information & Teambox can integrate clients to the system to colaborate with them easily.

The application is multilingual, has support for mobile phones & offers a read-only API for integrations with 3rd party softwares.

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It has a slick user interface to manage a website where new pages (with unlimited sub-levels) or images can be added, contact inquiries can be managed, etc.

The application offers a permission-based multi-user environment where it is possible to define which users can access to which modules.

It logs almost every action that makes it possible to view the activies easily.

Refinery is not an all-features-included CMS but includes the most-used ones which makes it a simple-yet-powerful application.

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It is built with Ruby on Rails & requires a MySQL database for storing the data.

It has 3 main modules:

• ticketing: to manage issues/requests
• code review / revision management: supports Subversion & Git)
• milestones / goals: to set & manage objectives for the project

And, comes with various add-ons like:

• wiki: manage documentation
• blog: to interact with the community, make announcements.
• agilePM: comprehensive support for your agile development process
• & more, which can be found in the wiki's installation pages.

Retrospectiva has an easy-to-use admin interface, a XML-REST-based API for integration with 3rd party applications & RSS support for following every content much simpler.

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Microblogging, with the wide usage of Twitter, is a hot subject in today’s web.

Using few words & spending less effort compared to the standard blogging, it becomes possible to share knowledge, feelings, etc. And, it keeps users connected to other users with the simple yet powerful community features.

While there are very popular microblogging services like Twitter, Tumblr or Plurk, being a rival may not be (or may be) the best idea. However, in order to create something unique, a community for a closed group or a microblog for a single user, there are still huge opportunities.

Here are 9 open source microblogging applications to create your own:

StatusNet (PHP)

StatusNet (previously Laconica) is the engine which runs the popular microblogging site Identi.ca.

It is built with PHP/MySQL & offers a smooth usage as it is a widely used, mature application.

P.S. The source can be found here.

Yonkly (Asp.Net)

Yonkly is an Asp.Net-powered Twitter-clone for creating your own microblogging community network.

Besides the open source version, it has a hosted & an advanced standalone version.

JaikuEngine (Python)

Jaiku was the microblogging site of Google. However, they decided no longer to develop the code but make it open source under the name JaikuEngine.

Anyone can set up and run their own JaikuEngine instance on Google App Engine. Alo, there is an open source mobile client & frontend.

Floopo (PHP)

This free microblogging script is built with PHP & MySQL.

It functions very similar to Twitter & provides a powerful backend to manage the whole system.

Jisko (PHP)

Jisko is a PHP microblogging application that offers a Twitter-like API for developing it further.

Users can have their profile pages, message with each other easily & Jisko is compatible with mobile devices.

PageCookery (PHP)

PageCookery is a single-user microblog which can pull data from social networks like Flickr, last.fm, etc.

It offers an Ajaxed interface where users can comment to the entries easily.

P.S. The original page is Chinese. However, you can view the English version behind Google Translate.

EchoWaves (Ruby on Rails)

EchoWaves is a ready-to-use hosted application where the source code is offered for free.

It is a collaboration tool & a social network which is focused to conversations rather than the users.

P2 Wordpress Theme (PHP)

This is a Wordpress theme which can convert your blogging engine into a Twitter-like interface.

It has real-time updates where new posts & comments come in without reloading. There are also inline comments, posting from homepage & more.

Motion (Typepad – Python)

TypePad Motion enables publishers and marketers to create vibrant, branded communities that deepen loyalty and increase page views while giving you total control of your brand.

It is based on Pownce & MovableType Motion and built with Django.

Blurt.it (PHP – Added on 19 October 2009)

Blurt.it is a fresh microblogging application that requires PHP/MySQL to run.

Very similar to Twitter, users can easily connect with each other with open or private threads.

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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.

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Although trying to create the next Facebook may not be a good idea, you may want to create a niche network or empower & add new features to the network you already have.

Here are 6 open source social networking applications which are developed continiously, well-documented & offer impressive functions.

Elgg

Elgg is a mature social networking framework which offers:

• advanced user management and administration
• social networking
• cross-site tagging
• powerful access control lists
• internationalisation support
• multiple view support (eg cell phones, iPhone)
• an advanced templating engine
• a widget framework and more.

Its plugin based system enables adding new features easily from a plugins database or creating your own.

Elgg is built with PHP / MySQL & comes with a JSON API.

PHPizabi

PHPizabi is a feature-rich open source social networking engine for creating & managing basic-to-advanced communities.

It is built with PHP / MySQL & besides every feature that can be thought for a social networking site, it offers:

• a multilingual interface
• mass mailing to users
• creating blogs
• forum integration & more

Dolphin

Dolphin is one of the most popular applications to create a community.

It is built with PHP / MySQL & has unique features like streaming video chat or ability to record videos from the application itself to share them.

Apart from the standard social networking features, it has an integrated billing system for paid-networks.

Anahita Social Engine

Anahita is a scalable social networking platform that is built as Joomla extensions using the Nooku framework.

It provides users an Ajaxed interface with powerful profile management & messaging capabilities.

It supports OpenID & has an integration with Amazon Cloud Storage to ease the management of growing data.

Community Engine

Community Engine is an open source plugin for Ruby on Rails applications that provides the common features of social networking applications including:

• authentication & user profiles
• blogs with tagging
• photo uploads
• forums & private messages
• friendships & activity feeds
• & more..

Lovd By Less

The application offers a ready-to-go base with features like:

• friending
• messaging
• blogs & comments
• photo galleries
• Fickr & Youtube integration
• & more..

It is built with Ruby on Rails.

BuddyPress (Bonus App.)

BuddyPress is a set of Wordpress plugins & themes for converting a Wordpress MU installation into a social networking website.

It has features like:

• friending
• private messaging
• forums
• groups
• activity stream
• & more..

PeoplePods (added on 19 November 2009)

PeoplePods (see WRD post) is an open source toolkit, built with PHP/MySQL, for creating social websites with ease.

It can be used to build a website from scratch or improve an existing one with social features.

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