Not just recent post displayed on the home page. But must be displayed like on Facebook and Google plus, see only posts of the users you follow or add as a friend, make logging required on the accueil page. Exactly like social networking website. I think having a website like that, can be a key of its success.
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RE: Is there a theme that can make my website more as social network like facebook and google+ ?
Turn Nodebb to a social network like Facebook and Twitter
I need a plugin that modify the Category page structure by: Displaying under each Topic the topic post content, the topic tools (vote, reply, share..) and a button to display replies to the main post of topic with their tools. Something like Facebook.