Click to view attachment Yet Another Forum.NET
YetAnotherForum.NET (YAF) is a Open Source discussion forum or bulletin board system for web sites running ASP.NET. The latest version is ASP.NET v2.0 with a Microsoft SQL Server backend. The full C# source code is available licensed as GPL.

Stable ~ YetAnotherForum.NET is stable and secure for a production environment.

Operating System :All 32-bit MS Windows (95/98/NT/2000/XP), Win2K, WinXP, Microsoft Windows Server 2003

Website | SourceForge Project

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WordPress is a state-of-the-art semantic personal publishing platform with a focus on aesthetics, web standards, and usability. What a mouthful. WordPress is both free and priceless at the same time.

More simply, WordPress is what you use when you want to work with your blogging software, not fight it.

WordPress is an Open Source project, which means there are hundreds of people all over the world working on it. (More than most commercial platforms.) It also means you are free to use it for anything from your cat’s home page to a Fortune 500 intranet site without paying anyone a license fee.

WordPress was born out of a desire for an elegant, well-architectured personal publishing system built on PHP and MySQL and licensed under the GPL. It is the official successor of b2/cafelog. WordPress is fresh software, but its roots and development go back to 2001. It is a mature and stable product. We hope by focusing on user experience and web standards we can create a tool different from anything else out there.

More Info: Word Press»

Click to view attachment Joomla!
Cutting Edge Content Management

Joomla! is one of the most powerful Open Source Content Management Systems on the planet. It is used all over the world for everything from simple websites to complex corporate applications. Joomla! is easy to install, simple to manage, and reliable.

Best of all, Joomla! is an open source solution that is freely available to everybody.

Joomla! for End Users
The basic Joomla! package is designed to be easy to install, even for non-programmers. Most people have no trouble getting our software up and running, and there is plenty of support available for newbies. Via a simple, browser-based interface you will be able to easily add new press releases or news items, manage staff pages, job listings, product images, and create an unlimited amount of sections or content pages on your site. You can try our simple demo to get quick taste of what Joomla! is all about.

Check it out: Joomla!

e107 Website System free, open soure software developed for free!
...the Lamborghini of the web, without the price tag.

e107 is a content management system written in PHP for management of websites or community portals, using the popular open source MySQL database system for content storage. It's completely free, totally customizable and in constant development.


Features

• High performance file-based caching
  
• Integrated News system and RSS Feed handling
  
• Simple to use and create template system
  
• Valid XHTML 1.1 Output
  
• Powerful Forums system integrated
  
• Easy to use Admin system

Try before you install...

e107.org

Click to view attachment LifeType
Open Source State-of-the-Art Blogging Platform

LifeType is an open-source blogging platform with support for multiple blogs and users in a single installation.

LifeType supports multiple blogs and users, media management, generation of standard content, clean URLs and support for subdomains.

LifeType is released under the GPL license, and requires PHP and MySQL to work.

More Info: LifeType

TangoCMS
Powerful. Simple. Secure.

TangoCMS is a free and Open Source PHP Content Management System (CMS). Its ease of use and powerful feature set allows you to quickly and easily create and manage an entire website

• Complies to W3C HTML standards.
  
• Is built with security in mind.
  
• Powerful yet easy for anyone, even with basic web knowledge, to use.

TangoCMS offers many Features to help you manage your website, publish content and speed up your work flow - including a powerful media module to display videos, pictures and audio files! With an ever growing Community, you will always get the best support with any problems or questions you come across.

Website: TangoCMS

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Movable Type - Professional Publishing Platform
Your All-in-One, Open Source, Social Publishing Platform

• Create beautiful blogs and websites
  
• Utilize a powerful content management system
  
• Build a vibrant social network

[12 August 2008]
"Starting today the Movable Type Pro Blogger License is available for free to anyone and everyone not running an official business. With this license, users can have:

• unlimited blogs
  
• unlimited authors
  
• unlimited community members
  
• unlimited everything

That's right, the Blogger license does not impose any caps upon its use and is free of the greatest barrier of all: cost."

More: MovableType

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JForum is a powerful and robust discussion board system implemented in Javatm. It provides an attractive interface, an efficient forum engine, an easy to use administrative panel, an advanced permission control system and much more.

Built from the ground up around a MVC framework, it can be deployed on any servlet container or Application Server, such as Tomcat, Resin and JBoss. Its clean design and implementation make JForum easy to customize and extend.

Best of all, JForum is freely available under the BSD Open Source license.
Operating System : OS Independent (Written in an interpreted language)

JForum: Features & Downloads

WordPress 2.6.2
September 8, 2008

"Stefan Esser recently warned developers of the dangers of SQL Column Truncation and the weakness of mt_rand(). With his help we worked around these problems and are now releasing WordPress 2.6.2. If you allow open registration on your blog, you should definitely upgrade. With open registration enabled, it is possible in WordPress versions 2.6.1 and earlier to craft a username such that it will allow resetting another user’s password to a randomly generated password. The randomly generated password is not disclosed to the attacker, so this problem by itself is annoying but not a security exploit. However, this attack coupled with a weakness in the random number seeding in mt_rand() could be used to predict the randomly generated password. Stefan Esser will release details of the complete attack shortly. The attack is difficult to accomplish, but its mere possibility means we recommend upgrading to 2.6.2.

Other PHP apps are susceptible to this class of attack. To protect all of your apps, grab the latest version of Suhosin. If you’ve already updated Suhosin, your existing WordPress install is already protected from the full exploit. You should still upgrade to 2.6.2 if you allow open user registration so as to prevent the possibility of passwords being randomized."

WordPress 2.6.2 also contains a handful of bug fixes. Check out the full changeset and list of changed files.

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Kunena— A Powerful Forum with a New Direction
Kunena, translated from Swahili meaning "to speak," arose out of a fork of the former Fireboard forum with a new team and some of the previous developers, including several Joomla core developers.

Amazing Ease-of-Use
Power doesn't mean complexity, and Kunena shows how incredibly easy it is manage your communication.

Lean & Mean
Seasoned software developers combine high performance and a top-notch architecture to bring you the best integrated forum.

Looking to the future
Working close with the Joomla team and having an impressive list of features in development, the future is bright for Kunena.

Kunena: http://www.kunena.com/