it's the third font on top of the Sign Up Button

or the one in the red banner

http://www.smashingmagazine.com/2007/11/08/40-excellent-freefonts-for-professional-design/

Pleeease help

I need this one, or a very similar one that is free to download

Franklin Gothic Light  Suggested by Tomás Silcher 

No queda claro a cual te refieres en ese link que pones. Si es la de la imagen aquí publicada:

Perfecto! Muchísimas gracias