[TYPO3-english] Personalized frontend content ext.?

[Pero Peric]

Hi,

I'm searching for TYPO3 ext. for frontend content personalization but i 
can't find anything. So, i would like frontend users to log in and to be 
able to click which content they should see on a page and which not. 
Anyone knows if such ext. exists for TYPO3 4.7.x ? Thx.

regards.