kochab

This plugin adds WordPress posts as topics in SimpleMachines Forum 1.1.7, and allows to put a link to this topic below the WordPress post for the user to add comments
More information on the plugin homepage: 
<a href="http://www.zonca.org/wordpress-post-to-smf" rel="nofollow ugc">WordPress plugin post to smf</a>
Main features:
<ul>
<li>SMF post is added when the WordPress post is published</li>
<li>SMF post is updated any time the WP post is updated</li>
<li>template function for linking from WP post to SMF post</li>
<li>link back from the SMF post to the WP post</li>
<li>it is possible to show on the SMF post just an excerpt </li>
</ul>
Admin page options:
<ul>
<li>SMF Board ID to post to </li>
<li>SMF User ID to set the post author</li>
<li>SMF Forum path and Url</li>
<li>Link from Forum to WordPress text</li>
<li>Max characters for SMF topic</li>
</ul>
If you use this plugin, please donate to support future improvements by clicking on the “Donate to this plugin” link

WordPress Post to SMF

This plugin adds Wordpress posts as topics in SimpleMachines Forum 1.1.7, and links the WP post to the comments in the forum

Edward Caissie

Plugin with multi-widget functionality that builds an SMF Forum RSS feed url by user option choices; and, displays a SMF forum feed. The widget includes the additional option to include in the feed: specific boards and/or specific categories. There are also check boxes to include the feed item date and the item summary, too.
NB: If updating from a version before 1.1 please make sure to re-save your widget options (check your feed type) for each instance after upgrading. This will set the feed type correctly using the new feed drop-down selection option. Thanks! ~cais 
* Copyright 2009-2015 Edward Caissie (email : edward.caissie@gmail.com)
This program is free software; you can redistribute it and/or modify 
 it under the terms of the GNU General Public License version 2, 
 as published by the Free Software Foundation.
You may NOT assume that you can use any other version of the GPL.
This program is distributed in the hope that it will be useful, 
 but WITHOUT ANY WARRANTY; without even the implied warranty of 
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
 GNU General Public License for more details.
You should have received a copy of the GNU General Public License 
 along with this program; if not, write to the Free Software 
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
The license for this software can also likely be found here: 
 http://www.gnu.org/licenses/gpl-2.0.html

BNS SMF Feeds

Plugin with multi-widget functionality that builds an SMF Forum RSS feed url by user option choices; and, displays a SMF forum feed.

WordPress Post to SMF vs BNS SMF Feeds