Unix Supports multiple forums with one script, threaded discussions, email password registration, message preview, automatic message deletion, searching, and more. WebBoard uses Microsoft Access 95 and takes full advantage of its open database technology. Web Crossing is a groupware application server, accessible via any Web browser. Makes communication more efficient and productive than newsgroups or mailing lists. Unix Focus is a powerful Web-conferencing system which is also extremely easy to use.
Prices vary depending on number of conference sites.
Vestris Inc. aGNeS offers a fully featured anonymous BBS with tons of options, online management system and virtually any layout. Finally a board that can look like the rest of your site. Free for non-commercial use. A Product of Matt's Script Archive, Inc.