disqus.com – Helps to manage all of your web commenting and discussions

I have started using disqus.com recently and found it useful for other people as well who comment online

Disqus offers two services that help improve discussions on the web:

Disqus Comments is a comment system and moderation tool for your site. This service lets you add next-gen community management and social web integrations to any site on any platform.

Disqus Profile lets you get the most out of the comments you post on sites all around the web. Take back control of what you've written by tracking and managing your comments all in one place. You can also use Disqus Profile to effortless follow and reply to what people are talking about, on and across sites.

Read more about the concept and the features here :http://disqus.com/about/