Jerboa is developed by Lemmy’s devs. It’s fairly decent, though it needs some polish in the search functionality.

wavedrom.com is something I myself discovered recently. It can draw timing diagrams by taking JSON-style text as input.

Another interesting thing I realised: In a centralised network like Reddit, if the site goes down, nothing is accessible. But if a Lemmy instance goes down, most, if not all communities you’re subbed to should still be up given they aren’t hosted in that instance.

Load distribution. Different Lemmy instances are run by different volunteers who can only put so much money into them. So if lots of volunteers put up their own instances, then ideally each instance could have a few users signed up and thanks to federation, they’ll all be interconnected.