Joomla 3.x Landing templates. Where find?

Question

Joomla

In general, I'm looking for a site with good Landing templates for Joomla 3.x (paid or free).
Topic 1: business;
Topic 2: selling a product or service The main thing is that all devices (PCs, tablets, mobiles)
should be correctly written and supported . Who worked with which ones (companies or templates), or writes templates himself, or knows where to look - tell me. Thanks everyone.

Answer 1

Here and here