Message Boards

AceBoard.net
Free and fully customizable message boards. Ad-supported.
http://www.aceboard.net/

Aimoo Forums
Hosted discussion boards which include a WYSIWYG editor and allows customization.
http://www.aimoo.com/

AtomicBoards
Offers free and paid customizable message boards. Free boards are ad-supported.
http://www.atomicboards.com/

BbBoard
Offers a feature-packed message board system.
http://bb.bbboy.net/

BoardHost
Remotely hosted discussion boards. Free trial available.
http://www.boardhost.com/

BoardNation
Offer SMF, phpBB, Invision Power Board, and vBulletin. Free and paid services available.
http://www.boardnation.com/

BoardServer
Provides completely customizable message boards. Commercial.
http://boardserver.superstats.com/

Boards2Go
Offers a free message board. This service is popup-ad supported.
http://www.boards2go.com/

Buildaforum.com
Provides commercial forum hosting. Ad-free.
http://www.buildaforum.com/

Bulletin Boards
Offers commercial bulletin boards.
http://www.bulletinboards.com/

ChatArea
Offers unlimited free remotely hosted forums. Ad-supported.
http://www.chatarea.com/

Community Builder
Offers discussion boards and other services that integrate seamlessly into web sites.
http://community.hunin.com

CreateForum.com
Provides free discussion board hosting. Ad-supported.
http://www.createforum.com/

CreateMyBB
Provides free MyBB forum hosting. Ad-supported.
http://www.createmybb.com/

CSD Clubs
Clubs service with multiple themes and layouts configurable per club. Ad-supported.
http://csdclubs.com/

Danethical.com
Provides forum hosting services. Ad-supported.
http://www.proforumco.com/

Delphi Forums
Offers free and paid forum hosting. The paid offer is ad-free.
http://www.delphiforums.com/

Discussforum.net
Provides commercial discussion boards which are optimized for web speed.
http://www.discussforum.net/

DKAT Internet Services
Paid discussion board hosting services for corporations and large organizations. Also offers password protected forums.
http://www.dkat.com/

Eboards4all
Offers free ad-supported discussion boards. Features include customizable layout, smilies and moderator options.
http://www.eboards4all.com/

Edorel.com
Offers free remotely hosted message boards. Ad-free.
http://www.edorel.com/

Exco Board
Offers a simple to use free message board with advanced features. Paid ad-free option available.
http://excoboard.com

EzBoard
Offers free and paid discussion board hosting. The free version is ad-supported.
http://www.ezboard.com/

ForumCo
Multithreaded, unlimited categories and forums, moderators. Free.
http://www.forumco.com/

Forumer.com
Offers Invision and phpBB board hosting services. Ad-supported.
http://www.forumer.com/

ForumExperts
XML based hosted forums for corporate and enthusiast websites. Logical threaded layout, markup features include images and formatting. Implemented through customizable control panel.
http://www.forumexperts.com/

ForumHoster
Provides free and paid discussion board hosting. Ad-supported.
http://www.forumhoster.com/

Forumlaunch.com
Provides commercial forum hosting services.
http://www.forumlaunch.com/

Free Boards
Free remotely hosted message boards. Features customizable layout options. Ad-supported.
http://www.freeboards.net/

Free Power Boards
Offer free customizable phpBB hosting.
http://www.freepowerboards.com/

Free YaBB Forum Hosting
Ad supported YaBB message board hosting. Offers ad removal as paid option.
http://www.yy2.com/

Hondos Bulletin Board
Provides remotely hosted discussion boards which support phpBB themes. Paid and ad-supported versions available.
http://hondos.org/

Hostboard
Offers paid Ultimate Bulletin Board discussion boards.
http://www.hostboard.com/

Hostsmf.com
Provides free SMF based forum hosting. Ad-supported.
http://www.hostsmf.com

Le Forum
Offers a highly configurable discussion board hosting service. Ad-supported.
http://forum.europeanservers.us

Lithium Technologies
Commercial discussion board hosting. Features management tools, to allow simple, easy management of communities with minimal moderator intervention.
http://www.lithium.com/

LiveBoards
Commercial discussion board provider. Features include content scanning, private areas and configurable look.
http://www.liveboards.com/

Message Realms
Provides paid customizable message board hosting. Offers a 45 day free trial period.
http://www.message-realms.com/

Mintro
Offers remotely hosted message board hosting.
http://www.mintro.com/

Moncom.net
Free open discussion forums which can be used as a regular discussion forum or knowledge base.
http://moncom.net/

Multi-Forums.net
Offers free Invision Board and phpBB hosting.
http://www.multi-forums.net/

Network54
Board hosting service which features custom headers, footers, fonts and also password protected areas.
http://www.network54.com/

Novogate.com
Commercial provider which offers two different types of discussion boards.
http://novogate.com/

OLI YaBB Forum Hosting
Unlimited sub-boards with web-based administrative controls.
http://www.onlineinstitute.com/forumsoftware.html

PickAForum.com
Provides free phpBB and Invision Board hosting. Ad-supported.
http://www.pickaforum.com

PoppyDog Web Tools
Advanced website tools for building a variety of forums and message boards with optional marketing, advertising, and community features built in. Free.
http://www.poppydog.com

Quick Topic
Free web bulletin board which supports posting by email. Paid pro version available.
http://www.quicktopic.com/

Raidersoft
Simple message board solution for small communities. Paid version available.
http://mb.raidersoft.com/

Ravelly.com
Offers a free customizable discussion board. Ad-supported.
http://www.ravelly.com/

RelyNet
Remotely hosted ZeroForum and Unite discussion board engines. Commercial.
http://www.rely.net/

Runboard
Free customizable message boards. Features include sub domains, security management and global accounts.
http://www.runboard.com/

Server Room
Offers commercial phpBB, FUDForum, and XMBforum hosting.
http://forum.hosting.serverroom.us/

SiteForums
Forums are easy to manage, flexible, and can be graphically customized.
http://www.timtyler.com/siteForums/

Smfforfree.com
Offers free SMF based forum hosting. Ad-supported.
http://www.smfforfree.com/

Stereodreamscene
Paid discussion board hosting service powered by Snitz Forums.
http://www.stereodreamscene.co.uk/

Sudden Launch
Free customizable message boards. Includes sub domain, unlimited boards, posts and threads. Ad-supported.
http://www.suddenlaunch.com/

Timur.com
Provides a free, customizable forum hosting service.
http://www.timur.com/

VivBoard
Provides free remotely hosted discussion boards. Features large posts and pictures.
http://www.vivboard.net/

VoyForums
Free hosted discussion board service. Different layouts to choose from. Ad-supported.
http://www.voy.com/