ChitChat.NET ASP.NET forum - ASP.NET online discussion app for use with SQL Server. Highly scalable with advanced security options. Download free evaluation version. - http://www.clickcess.com/chitchatdotnet.asp
uniForum - (previously named TWMB) an ASP.NET internet message board application. - http://uniforum.biz/
POP Forums - ASP.NET database-backed bulletin board software. By POP World Media, LLC. - http://popforums.cliquesite.com/
ITCN ASP.NET Forum 2004 - A free, open source website Forum and Discussion Board programmed in the Microsoft dot Net Framework with Visual Basic. - http://forum.itcn.com/
InstantForum.NET - ASP.NET based discussion forum. Full administration, WYSIWYG editor, Permission based forum access, Assign forum moderators, VS.NET solution available. - http://www.instantasp.co.uk/products/instantforum/default.aspx
EasyForum - Web-based forum system written C#. - http://assistsoft.com/forum/
dotNetBB Forums - ASP.NET based forum software. [Commercial] - http://www.dotnetbb.com/
Active Data Online MessageBoard - A configurable Internet message board ASP.NET application to manage forums, topics, messages and users, which can be incorporated into an existing ASP.NET website. [Commercial] - http://www.activedataonline.com.au/messageboard.html