Sites that provide info about fediverse instances. I will move this info to a wiki page next week. If I'm missing any sites, please add them:

* 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(?)