I think the latest "cool" software is Misskey. https://misskey-hub.net/ https://misskey-hub.net/ Mastodon's still the most popular, though. (English version of

I think the latest "cool" software is Misskey. https://misskey-hub.net/ https://misskey-hub.net/ Mastodon's still the most popular, though. (English version of that website available; just add /en/ to the end of the URL.)