Independent Publisher

 Independent Publisher  is an open source responsive and modern WordPress theme that is Indieweb friendly.

Standards Support
It has reasonable microformats support:
 * h-entry
 * author h-card

It has additional code to handle:
 * Receiving webmentions (and better support for backward compat trackbacks & pingbacks) and displaying them in its comments section.

Issues
See (and add new issues to)
 * https://github.com/raamdev/independent-publisher/issues

Related

 * An updated and maintained fork of Independent Publisher called IndieWeb Publisher is maintained by . It streamlines some of the original themes' code and adds in some additional fixes to make the theme more IndieWeb friendly.
 * There is a separate and related, but forked, version of Independent Publisher in the WordPress.com repository that does not have these indieweb friendly elements.