Indiewebify.me

 Indiewebify.me  is a service that checks how indieweb-compatible your site is and reports back its results; the verb indiewebify also means the act of making your site more IndieWeb friendly.

Indiewebify.me is roughly based on IndieMark and is available as open source:
 * https://github.com/indieweb/indiewebify-me

Tools

 * https://monocle.p3k.io/preview - preview feeds or posts to see what they will look like in Monocle

Badges
an "IndieWebified" button for your website