English Discuz! Board one of the most powerful internet forum script base on PHP, supporting MySQL and PostgreSQL database management systems. It included all features of any others commercial forum but it is free and open source. Version 7 with highly use of Ajax gives user a great user friendly interface.

Silentum Boards are unlike most other PHP message boards out there, for the simple fact that they use no MySQL at all. The boards use flat text files to store board and user information. This makes Silentum Boards ideal for anyone whose host has limited or no MySQL abilities. They include anything you'd ever want in a message board, including member profiles, a search feature, a Karma system, a fully working moderation system, graphical smilies and post icons, various stylesheets to choose from, and much, much more. They require no installation, so all you need to do is upload and go.

A message board that is ideal for webmasters who don't need or want big forums on their sites. It doesn't require any SQL databases. It stores all posts as HTML pages (to minimize the load on your server) and features smileys, instant new post notification, easy deletion of inappropriate posts, style customization and more. It even comes with e-mail protection against SPAM harvesters and a bad words filter which will replace all bad words with ****. You can modify the look by editing header/footer and style files.

The full name of AEF is Advanced Electron Forum. This bulletin board software is free software. It is written in PHP and MySQL. Some great feautures that users speak of : 1) WYSIWYG Editors 2) JS DOCK for easy navigation(A first from AEF) 3) Customizable Themes 4) News System with articles 5) ShoutBox 6) Calendar 7) Report Posts 8) Suggest Framework 9) Threaded Mode for topics 10) Preview Posts 11) Users who have read a topic 12) RSS Feeds 13) Smart Redirects 14) Group Legends 15) Domdrag for reordering Categories, Forums, emoticons (A new feature included for the first time ever in a forum software.) These are just some of the features. 16) Database and file backup from within the Admin CP. 17) Multiple Languages 18) UTF-8 Supported 19) Search Engine Optimization Tools 20) IP Ban 21) W3C Validated AEF has a very simple and easy to use Administration Panel and installing this software is a piece of cake! You can install new themes, customize themes the way you want.

freeForum is a free, simple, and multilingual discussion board script which can be fully integrated with your existing page layout. It concentrates on the main features of typical forum scrips, and does it well. With freeForum, you are free: free to post, free to add categories, free to change the layout, and free to integrate it in you site. It's simple: no image, no avatar, no smilies, no useless statistics, fully CSS and template based. It's easy for the administrator: backup and restore functions, captcha images, IP banning, flood protection, smart forms, open and closed categories, reserved user names... The multilingual interface is available in English, French, Romanian, Dutch, Swedish, German, Russian, Chinese, Spanish, Polish, Turkish, Bosnian, Italian, and Indonesian. freeForum is free software licensed under the terms of the GNU GENERAL PUBLIC LICENSE (GPL).

Quicksilver Forums is a fast, feature rich bulletin board system written in PHP and MySQL. It is fully object oriented and optimized for speed, ease of use, and easy modifications. QSF checks all inputs though a common interface which drastically reduces the chances of exploitable bugs. Powerful and flexible skinning engine makes giving your board a new look very simple. Advanced permissions system allows for fine grained group and user permissions. Based on the popular MercuryBoard software.

My Simple Forum is a free forum software that is very simple. This allows for high customability and allows for easy integration into your website. The forum can be easily modified to your needs and their will be many addons to download for it.

phpBulletin is a FREE message board software that is easy to use. It isn't bloated but still has some major feature. Current features: Quick Login, PM's and all the other standard. Soon to come: Groups, blogs, social groups, profile comments, and much much more! Come check us out and see why phpBulletin is different from the rest!

Here is simple straight forward message board for webmasters who need a elegant but simple forum. It features smileys, instant new post notification, easy deletion of inappropriate posts, style customization and more. You can create skins or choose from prebuilt skins. It got a bad words filter which will replace all bad words. A powerful admin panel which can manage all the aspects the discussion board. Create your virtual community in few minutes. This freeware is designed to provide best user friendly experience to end users.

This is a very simple PHP message board with integrated spam protection. It requires a MySQL database and can be easily adapted with CSS. Supports smilies and multiple languages.

Elite Bulletin Board is an advanced Bulletin Board program that provides advanced features such as CAPTCHA, sub-board, skinning ability, multilingual, commercial password encryption, and much more.

A simple, lightweight, and great looking PHP/MySQL driven forum software with all basic forum functions. Efficiency and speed is what Hyper PHP Board is all about.

PXBulletin combines the features and power of many different forum softwares into one great package. With an easy to use template engine. We listen to our users needs.

Viscacha is a free bulletin board system with an integrated content management system. The intention of the software engineers is to combine the current standards with new and user friendly features. The system supports plugins and components for easily extending the core system. Viscacha uses an database abstraction layer to support as many databases as possible. Currently there is only a layer for the open source database engine MySQL. With this software you can easily set up a complete (personal) homepage. The CMS perfectly extends the bulletin board system to have a homepage which is connected to the community.

The RiotPix message board was born out of frustration of not being able to find a simple PHP/MySQL forum that could easily be re-coded by the end user. Most forums were either so complex that many weeks of studying the code were necessary to adapt it, OR they were so simple that they needed a ton of work to do anything at all. RiotPix attempts to alleviate that problem by providing a simple avatar message board. To top it off, most message boards (even the large scale ones like phpBB) remain non-compliant of w3c standards. This board is XHTML 1.0 compliant, css compliant, and RSS 2.0 or Atom 1.0 compliant as well.