I decided to research forum converters and I was very surprised by how much coverage is out there. vBulletin leads the pack with the most converters available at one point or another. Note: Many of those listed may not longer be supported, particularly due to end of life of the other product, or lack of demand.
I've listed the supported importers, converters, and merge systems (they vary in naming from platform to platform) for vBulletin, IPB, myBB, xenForo, and phpBB. With the number of forums out there, this could really be the topic of an entire forum!
vBulletin
Importers (Members Area/Import download link)
ImpEx Systems with Modules for:
http://www.vbulletin.com/docs/html/impex_module_dump
Available:
ASPPlayground, CHC Forum, DCForum+ MySQL, DiscusWare 4.x Pro tab file data, InstantForum, Invision Community Blog, MxBoard, MyBulletinBoard (MyBB), Infopop Open Topic, PNphpBB2 (Post Nuke), Advanced Electron Forum, w-Agora, Allaire, ASP-DEV, BuildACommunity, bbBoard, bbpress, beehive, CFBB, Community Server, CuteCast, Deluxe Portal, DigiPost, DiscusWare (file based), Discuz, dotnetBB, dragonfly, Drupal, dzoic, e107, Edge CMS, EncoreII, eshare, Eve 1.3.4 / Groupee 4.0.3, ExpressionEngine, fireboard, freethreads, FUD Forum, FuseTalk, fusion BB, fusionBB 2, Geeklog, Ikonboard (MySQL), Invision Power Board, Invision Board 2, Invision Board 3, JForum, Jive, Jive Forums, Seditio (LDU), Max Web Portal, megaBBS, mercuryboard, miniBB, mmforum, mvnforum, mysmartbb, MyTopix, openBB, Oxygen, Phorum 3, Phorum 5, Photopost, phpBB1, phpBB2, phpBB3, phpMyForum, PHP Fusion, Phpwind, PunBB, Simple Board, SiteFrame, SiteNet BBS, Simple Machines Forum, SMF, Snitz Mysql, ThWboard, Toast Forums, Tritanium BB2, trollix XForum, TruBB, ttCMS, Text file importer, Infopop UBB classic, Infopop UBB.threads, Infopop UBB.threads, Ultraboard, versatile Bulletin Board, vBJournal, vBulletin Forum 2 Blog, vBlogetin, vanilla, vBulletin 2, vBulletin, vBulletin lite, vbzoom, WoltLab Burning Board, wbb3, webbbs, Webcrossing, Web Wiz Forums, WordPress, wowBB, XMB forum, Xoops - Newbb, Xsorbit X5, YaBB 2, YaBB Gold, YaBB SE, Yet Another Forum, Yahoo Groups access dB download, Yahoo groups (raw text), zeroforum
Note: Some are tier 3 and discontinued.
IPB Converters
http://www.invisionpower.com/suite/convert.php
Avaiable:
4images 1.7, bbpress, Community Server, Coppermine 1.4, Discuz, Dragonfly, e107, eBlah, FudForum, FuseTalk, FusionBB 3.0, InstantForum, MegaBBS, MyBB 1.4, Ning, Photopost 6.2, hotoPlog 2.x, phpBB 2.0, phpBB 3.0, phpFusion 6, phpMyForum 4.1, PunBB 1.3.4, simplepress, SMF 1.1 and 2.0, UBB.Threads 7.5, vBulletin 3.8, vBulletin 4.0, WebWiz 8.x, Woltlab BB 3.0, Wordpress, WowBB 1.7, XMB 1.9, Xoops, YAF.NET 1.9, ZenPhoto 1.2
myBB Merge System
http://www.mybb.com/downloads/merge-system
Available:
Invision Power Board 2.1, 2.2, or 2.3, MyBB 1.6 (Merge multiple copies of MyBB in to the one), phpBB 2, phpBB 3, SMF 1.1, 2.0, PunBB 1.2, vBulletin 3.6, 3.7, or 3.8
xenForo Importers/Converters
http://xenforo.com/community/threads/pre-sales-faq.4951/
Available:
vBulletin 3.6/3.7/3.8 importers built in
IP.Board 3.1.x importer built in
Unofficial vBulletin 4.0/4.1 importer available as an add-on
Unofficial PunBB 1.2/1.3 importer available as an add-on
Unofficial SMF 2 importer currently being developed
phpBB Converters
http://www.phpbb.com/customise/db/convertors-22/
http://www.phpbb.com/community/viewtopic.php?f=65&t=1641375
Available:
Categories Hierarchy, Drupal 5.x, IPB 1.3, IPB 2.3.x, Icy Phoenix 1.3.0.53a, myBB 1.4.x, Ning, Phorum 5.0.x, PHP-Nuke, United-Nuke 4.2.08ms2, PHP-NUKE 7.9, Nuke-Evolution Basic - 2.0.5, PHP Nuke Clan 4.2.0, SMF 1.1.x, phpBB2 with Simple Subforums, Proboards, SMF 1.1.x, SMF 1.1.x converter support topic, SMF 2.0RC.x, vB 3.x, Yahoo
Continue Reading...
I've listed the supported importers, converters, and merge systems (they vary in naming from platform to platform) for vBulletin, IPB, myBB, xenForo, and phpBB. With the number of forums out there, this could really be the topic of an entire forum!
vBulletin
Importers (Members Area/Import download link)
ImpEx Systems with Modules for:
http://www.vbulletin.com/docs/html/impex_module_dump
Available:
ASPPlayground, CHC Forum, DCForum+ MySQL, DiscusWare 4.x Pro tab file data, InstantForum, Invision Community Blog, MxBoard, MyBulletinBoard (MyBB), Infopop Open Topic, PNphpBB2 (Post Nuke), Advanced Electron Forum, w-Agora, Allaire, ASP-DEV, BuildACommunity, bbBoard, bbpress, beehive, CFBB, Community Server, CuteCast, Deluxe Portal, DigiPost, DiscusWare (file based), Discuz, dotnetBB, dragonfly, Drupal, dzoic, e107, Edge CMS, EncoreII, eshare, Eve 1.3.4 / Groupee 4.0.3, ExpressionEngine, fireboard, freethreads, FUD Forum, FuseTalk, fusion BB, fusionBB 2, Geeklog, Ikonboard (MySQL), Invision Power Board, Invision Board 2, Invision Board 3, JForum, Jive, Jive Forums, Seditio (LDU), Max Web Portal, megaBBS, mercuryboard, miniBB, mmforum, mvnforum, mysmartbb, MyTopix, openBB, Oxygen, Phorum 3, Phorum 5, Photopost, phpBB1, phpBB2, phpBB3, phpMyForum, PHP Fusion, Phpwind, PunBB, Simple Board, SiteFrame, SiteNet BBS, Simple Machines Forum, SMF, Snitz Mysql, ThWboard, Toast Forums, Tritanium BB2, trollix XForum, TruBB, ttCMS, Text file importer, Infopop UBB classic, Infopop UBB.threads, Infopop UBB.threads, Ultraboard, versatile Bulletin Board, vBJournal, vBulletin Forum 2 Blog, vBlogetin, vanilla, vBulletin 2, vBulletin, vBulletin lite, vbzoom, WoltLab Burning Board, wbb3, webbbs, Webcrossing, Web Wiz Forums, WordPress, wowBB, XMB forum, Xoops - Newbb, Xsorbit X5, YaBB 2, YaBB Gold, YaBB SE, Yet Another Forum, Yahoo Groups access dB download, Yahoo groups (raw text), zeroforum
Note: Some are tier 3 and discontinued.
IPB Converters
http://www.invisionpower.com/suite/convert.php
Avaiable:
4images 1.7, bbpress, Community Server, Coppermine 1.4, Discuz, Dragonfly, e107, eBlah, FudForum, FuseTalk, FusionBB 3.0, InstantForum, MegaBBS, MyBB 1.4, Ning, Photopost 6.2, hotoPlog 2.x, phpBB 2.0, phpBB 3.0, phpFusion 6, phpMyForum 4.1, PunBB 1.3.4, simplepress, SMF 1.1 and 2.0, UBB.Threads 7.5, vBulletin 3.8, vBulletin 4.0, WebWiz 8.x, Woltlab BB 3.0, Wordpress, WowBB 1.7, XMB 1.9, Xoops, YAF.NET 1.9, ZenPhoto 1.2
myBB Merge System
http://www.mybb.com/downloads/merge-system
Available:
Invision Power Board 2.1, 2.2, or 2.3, MyBB 1.6 (Merge multiple copies of MyBB in to the one), phpBB 2, phpBB 3, SMF 1.1, 2.0, PunBB 1.2, vBulletin 3.6, 3.7, or 3.8
xenForo Importers/Converters
http://xenforo.com/community/threads/pre-sales-faq.4951/
Available:
vBulletin 3.6/3.7/3.8 importers built in
IP.Board 3.1.x importer built in
Unofficial vBulletin 4.0/4.1 importer available as an add-on
Unofficial PunBB 1.2/1.3 importer available as an add-on
Unofficial SMF 2 importer currently being developed
phpBB Converters
http://www.phpbb.com/customise/db/convertors-22/
http://www.phpbb.com/community/viewtopic.php?f=65&t=1641375
Available:
Categories Hierarchy, Drupal 5.x, IPB 1.3, IPB 2.3.x, Icy Phoenix 1.3.0.53a, myBB 1.4.x, Ning, Phorum 5.0.x, PHP-Nuke, United-Nuke 4.2.08ms2, PHP-NUKE 7.9, Nuke-Evolution Basic - 2.0.5, PHP Nuke Clan 4.2.0, SMF 1.1.x, phpBB2 with Simple Subforums, Proboards, SMF 1.1.x, SMF 1.1.x converter support topic, SMF 2.0RC.x, vB 3.x, Yahoo
Continue Reading...