X-Forum

X-Forum is a free bulletin board, which can be used for any website.  Many powerfull features, including guests posting, reply notification, many moderating tools. All these features are developed with keeping security in mind. It's easy to install because you don't need to set any variables before uploading.
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SiteNet BBS

Fast, customizable, moderation, upload of user images, user profiles, optional user registration, emoticons, e-mail notification and many other features. Comes with extensive admin and moderator admin panels to manage all aspects of your forums. Includes a special setup interface to ensure easy installation.
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YaBB - Yet another Bulletin Board

YaBB (Yet another Bulletin Board) is an open-source forum and one of the easiest to install, most secure and nicest looking BBS’s available!  A variety of features to compete with commercial products include UBBC code, full administration, topic notification, private boards, recent posts, moderator options and more!
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VPBB - Virtual Perl Bulletin Board

VPBB defines simplicity in every aspect of a message board. No frills or extra weight, just a message board with the necessary requirements presented in a "simulated" frames interface. Easy setup. No special modules. Runs on the standard Perl bundle.
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E-Blah!

E-blah has nearly all the features of boards users pay for, and then some. The administration center has over 25 sections, from adding new smiles, to changing the board settings. There is also an elaborate Private Messaging system, polling system, etc!
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The VAXbb Homepage

VAXbb is a fast, text-only bulletin board for use on the Web. It's written in PERL, and runs on UNIX boxen (though an NT port should be possible, just not a high priority right now). Its functionality and use is based loosely on a VAX-terminal-based bb system that I used in school.
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CuteCast bulletin board system

CuteCast is a tidy, yet powerful bulletin board system. Whether you want unlimited boards and categories, ability to add your own custom emoticons on the fly, language packs, invite-a-friend feature, ranking system or et cetera, CuteCast provides the tools you need to make your homepage more interactive and entertaining
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ScareCrow Message Board

From the outset, the goal of ScareCrow was to create a easy to use but feature-rich, free message board for the Internet community. However, we understand that things are always significantly easier for the developer to figure out than for the user!
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