Who is implementing these? I saw there was an Apache project as a reference implementation a while ago but it was now abandoned. Is there a new reference implementation or are there plans for creating one?
Micropub servers: https://indieweb.org/Micropub/Servers
Webmention implementations: https://indieweb.org/Webmention
More details: https://indieweb.org/indieweb_network
I found this on the Webmention Implementation Report [1].