What "Like" mod is this?

[Pirat3]

What like mod is this:
http://oi54.tinypic.com/29399n8.jpg

Is this only a vB4 feature?

[MagicThemeParks]

That is the built-in feature for vBSEO. vBSEO is a paid add-on for vBulletin.

[Pirat3]

Do you know by anychance if we can transfer the Thanks system to the vBSEO like system?

[MagicThemeParks]

Unfortunately I am not aware whether you can or cannot. You may want to check over at vBSEO.com and see.