Pushl

 Pushl  is a command-line tool for generating periodic push notifications (such as WebSub, Webmention, and Pingback) from sites which do not provide push themselves.

It was written as a companion to Publ but it will work with most site generators, including static generators. It works best with sites which provide a subscription feed (RSS, Atom, h-feed, etc.), which also includes many forums such as phpBB.

The intention is for it to run from a cron job, but it can also be run manually or via a Git commit hook or the like.

IndieWeb uses

 * uses it to send notifications for several sites