IntenseDebate vs. Question2Answer
Take a look at this side-by-side comparison of IntenseDebate and Question2Answer.
At a Glance
IntenseDebate
About IntenseDebate
IntenseDebate is a blog commenting system that supports Typepad, Blogger and Wordpress blogs. The system allows blog owners to track and moderate comments from one place with features like threading, comment analytics, user reputation, and comment aggregation.
Question2Answer
About Question2Answer
Question2Answer (Q2A) is a popular open-source Q&A platform for PHP/MySQL.