Do you think that a Forum module can offers only basic forum features. Think again. whmcsBB, my flagship module, moves the water. Has (or should have in upcoming updates), most of the features that big names like vBulletin, xenForo, IPB have. From now on you don't need a forum bridge. whmcsBB is your best choice to start a community in your WHMCS website.
Most important features:
The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.
Favicon manager module lets you add a favicon image to your WHMCS website.
Social Login is a free WHMCS plugin that allows your visitors to comment, login and register with 35+ social networks like for example Twitter, Facebook, LinkedIn, Instagram, Google and Yahoo.
Display social buttons to allow your customer sharing your website products and pages to Facebook, Twitter, Pinterest, LinkedIn, Reddit, etc