Maybe use this as a scrobbling server?
A federated microblogging application written in node.js. Replaces Twitter. Implements ActivityPub so it's already part of the Fediverse.
A URL shortening service for posting links to Twitter, identi.ca, or any other service you like. There is even an option to generate a QRcode out of a URL.
Salut à Toi is a communications framework built on top of XMPP (and all that brings with it) which implements messaging, microblogging, file sharing, e-mail (with a regular mail client), and more. Wherever there is an XMPP server, you can use it. Has multiple front-ends, including a web interface and a desktop client. Written in Python, uses Twisted and Wokkel.
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