Movable Type is the most widely used blogging platform among professional bloggers, small businesses, web designers, and educational and nonprofit institutions.

WordPress is an easy and powerful way to start blogging.  Although used mainly for recreational or journalistic purposes, blogs can be used as a marketing tool to advertise products and services in a news feature format.

Invision Power Board, an award-winning scaleable bulletin board system, allows you to effortlessly build, manage and promote your online community. Advanced yet intuitive features like multi-moderation allow you to focus on developing your community, rather than wrestling with complex settings. 

vBulletin is a 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 complemented with a highly efficient and ultra fast back-end database engine built using MySQL.

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.