Phpbb – is a high powered, fully scalable, and highly customizable Open Source bulletin board package. phpBB has a user-friendly interface, simple and straightforward administration panel, and helpful FAQ. Based on the powerful PHP server language and your choice of MySQL, MS-SQL, PostgreSQL or Access/ODBC database servers, phpBB is the ideal free community solution for all web sites.
vBulletin – powerful, scalable and fully customizable forums package for your web site. It has been written using the Web’s quickest-growing scripting language; PHP, and is complimented with a highly efficient and ultra fast back-end database engine built using MySQL.
IPB (Invision Power Board) – is one of the world’s leading providers of community solutions. Some of the world’s largest companies have chosen IPS software to power their online communities, as well as countless thousands of small to medium sites.
MyBB – is a powerful, efficient and free forum package developed in PHP and MySQL. MyBB has been designed with the end users in mind, you and your subscribers. Full control over your discussion system is presented right at the tip of your fingers, from multiple styles and themes to the ultimate customisation of your forums using the template system.
SMF (Simple Machines Forum) – is a free, professional grade software package that allows you to set up your own online community within minutes. Its powerful custom made template engine puts you in full control of the lay-out of your message board and with our unique SSI – or Server Side Includes – function you can let your forum and your website interact with each other.