Forum software recommendation with outbound link modification

[Truffles]

I'm looking for a recommendation of some free forum software that is easy to install and preferably has either built in functionality or freely available community additions that enable it to take links to a certain website (eBay) and modify them to include my affiliate info.

Technically I don't believe this would be cookie stuffing since the user would be expecting to be directed to eBay...

Anything available that does this?

 

[innovatewebs]

PHPBB and yabbforum

 

[Truffles]

Thanks for the suggestions...do you know where I can find info on the aforementioned functionality I'm looking for that will let me replace eBay links with my affiliate links?