Kbin is another open source link aggregation program with a different developer that uses the same protocol as Lemmy (ActivityPub), so kbin and Lemmy instances can communicate with each other. If you see anyone with “@kbin.social” after their name then that’s where they’re from. You can check it out yourself here as well kbin.social
This is what I was thinking of! I’m still learning how to find things on the fediverse, did you use one of the search engines?