Bridgy Fed lets you interact with federated social networks like Mastodon and Hubzilla from your IndieWeb site. It translates replies, likes, and reposts from webmentions to federated social networking protocols like ActivityPub and OStatus, and vice versa.
This isn't syndication or POSSE! You don't need an account on Mastodon, Hubzilla, or anywhere else. Bridgy Fed lets your site act like a first class member of the fediverse. People on federated social networks (aka fedsocnets) will see your posts directly from your own site, and vice versa.