Thanks for your visit first and I'd like to share with you some of the new exciting features you will find in the upcoming V4:

1. Social Network (Facebook, Twitter) Sign In Support;
2. Featured Articles Slider and Search Everywhere;
3. Search Engine Remake

You can also find other features we planned for version 4 in Forum News.
 
For the current v3.9, You can download the Trial version and test it on your machine.
 
Also, see the point below for detailed instruction on Integrating the Forum with your own Membership System!