Sites that provide info about fediverse instances. If I'm missing any sites, please add them. This is the maintained version of the list we began at issue https://gitlab.com/fediverse/fediverse.gitlab.io/issues/14

* https://fediverse.network - ActivityPub and OStatus only

* https://the-federation.info/ - originally Diaspora* protocol only, now include instances of all apps implementing all federated social network protocol

* https://mnm.social/ - Mastadon only

* http://sp3r4z.fr/mastodon -Mastodon only, no simple UI for web browser(?)

* https://fediverse.joinout.de/ - OStatus protocol only(?)

* https://mustafa.kotori.me/ - GNU Social only

* https://kumu.io/wakest/fediverse - visualization, OStatus protocol only(?)