Update instance monitoring sites

instance-monitoring-sites.md

@@ -1,9 +1,13 @@
 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://fediverse.space - Mastodon / Pleroma only (?)
+
+* https://fediverse.network - ActivityPub and OStatus only (?)
+
+* https://lucahammer.at/vis/fediverse/2018-08-30-mastoverse_hashtags - ActivityPub and OStatus only (?)
+
 * https://mnm.social/ - Mastadon only
 
 * http://sp3r4z.fr/mastodon -Mastodon only, no simple UI for web browser(?)