vbulletin is a great paid forum script with lots and lots of features. But features have no limit, few big brains think of some other features which might be added to the script and create what is so called vbulletin modifications, mods, plugins, add-ons, hacks etc.. Many of the mods can be free, but no comparison to paid premium mods which comes with support or installation help. Here are few of them :

vbSEO – vbulletin SEO mod

vbCover Plugins

vbAdvancedCMS Dynamics

ProvB

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