The only other app I looked at required phpBB3, which we don’t run. I can look at Forum Runner and see what it requires. I’m always a bit wary of plugins as (a) they may present security risks to the server, and (b) they cannot circumvent our banner advertising as the sponsors keep the server running with their sponsorship fees.
[Edit] After a quick look, the app does not do either of the above. It requires phpBB3 and it presents the content without the sponsor banners, which we’re not willing to consider at this time.