Bridgy pulls comments and likes from social networks back to your web site. You can also use it to publish your posts to those networks.
It’s mentioned in the documentation that one can reconstruct URLs to allow manually resending webmentions for missed backfeed. However, it appears this may no longer work(?) as these reconstructed URLs, which used to be static are now automatically redirecting to their siloed instances.
redirects to https://twitter.com/schnarfed/status/476408043819659264
Separately, though related, the example in the documentation for Instagram no longer seems to exist and could be replaced and the example for Google+ could be removed as the service no longer exists.
Don’t forget that I’m listening to content in the class as well! Perhaps this will be your first listen webmention? 😉
For badges from static sites, you could simply use raw HTML on a page like Aaron Parecki outlines.1 The “sending” site doesn’t need to be able to send webmentions although the receiving site needs to be able to receive them. You can then use a service like http://mention-tech.appspot.com/ or https://telegraph.p3k.io/send-a-webmention to have your static site send the webmention for you!