Michael Stewart

Picturing how a code diff will affect your site is almost impossible. We built Diffd to make it easier to see layout bugs before you push new versions of your website. It finds and highlights visual differences between your staging and production environments on a variety of devices so you can fix bugs before you release.

The get link seems to be broken now. Takes one to: http://hipcamp.com_2/?ref=producthunt

The next feature to do will be location based bars so you can easily make your site feel more locally relevant without creating a ton of different landing pages.