hello Nani, couple of options:
1) you should look at our latest AEM Livefyre technology: http://www.adobe.com/marketing-cloud/enterprise-content-management/ugc-content-platform.html - allows to curate content posted on Social Networks and expose the feeds in AEM via the new Livefyre AEM components.
2) you can embed the various widgets available on developer.facebook.com, developer.twitter.com etc. into your AEM pages
Bertrand