Enable application users to participate in discussions within your application. Host multiple discusion topics and threads in moderated and unmoderated forums.

ASP.Net Discussion Forum Components by ASPPlayground.net

ASPPlayground.NET SQL Forum V2.5.5

ASPPlayground.NET SQL Forum Software has been proven to be the most scalable, most feature-packed, and most affordable ASP + SQL Forum software on the market to date.

ASP.Net Discussion Forum Components by JitBit

AspNetForum V4.6 -  Jitbit AspNetForum is a powerfull forum solution for any ASP.NET website. Features user registration, online administration, email notifications etc. Can use both Access OR Sql-server. FREE edition available.