[djbaxter]

Originally Posted by Racechaser

I want to add Nav tabs and was thinking about this one

Tabs Add System for vBulletin 4 (sstab advanced)

That's okay. I found it conflicted with certain vBulletin features in earlier versions of vBulletin 4.x so I switched to this one: https://vborg.vbsupport.ru/showthread.php?t=228507 - this has continued to work well right through to the most recent version of vB4.

Originally Posted by Racechaser

And also an arcade section. Any tips there on whether an arcade in your forum creates pitfalls that you would not think about? I was thinking about this one:

v3 Arcade - Professional vBulletin Gaming (vB4)

Arcade add-ons may attract new members but they tend to stay in the arcade instead of participating in the forums. I had one for a while and dumped it.

Originally Posted by Racechaser

And a chatbox like this
VSa - ChatBox (AJAX)

I'd strongly advise AGAINST that or any chat box addp-on. Again, it detracts from content in your forums so it's a total flop for SEO. Second, they can be a nightmare to moderate. And third, they come typically with various security vulnerabilities.