Definitely conscious of being not the smartest man on Earth, I'm looking for a free font – as the web-page project is a gift for a friend – similar to Helvetica Rounded Black.
It hasn't got to be a clone and not even similar to Helvetica R'n'B: I'd just like to use a fat font with rounded edges.

Any suggestions? Even a category would be nice – as I'm lost in the abstractfonts menu.

What do you find confusing about the menu?

Try Sans-Heavy
http://www.abstractfonts.com/category/53-48/Heavy

or Sans-Smooth
http://www.abstractfonts.com/category/52-48/Smooth

or Heavy
http://www.abstractfonts.com/category/53/Heavy

or Heavy-Smooth
http://www.abstractfonts.com/category/52-53/Smooth

Thank you, Alex. It is not your work or the menu in itself: I guess it's my own fault the scarce agility searching things in English :)
I just don't know – or didn't – where to search.

Thanks again.

No problem. Just trying to find ways to improve the site, so let me know if you have any difficulties or suggestions.