Snikket is a new XMPP/Jabber-based decentralised FOSS messenger service. You can follow at:
The official website is https://snikket.org
It aims to make XMPP into a more viable alternative to Whatsapp etc by providing consistency in design and terminology.
(It's sort of how Mastodon made ActivityPub more mainstream, by using consistency to make it clear the instances are part of one network.)
The benefit isn't technical, it's userbase. If Snikket can convince more people to join XMPP, then current XMPP users will have more people to communicate with on the network.
It's like Mastodon made a cleaner and easier way to use the Fediverse, which drew millions of users to it, which benefitted people on non-Mastodon Fediverse instances too.
lor.sh is yet another mastodon instance.