I’m currently using Sync even though it’s closed source because it was still a really well-made app, but it seems to be abandonware now. Jerboa is great and it’s actively developed, but IMO it’s also the ugliest one.
Can you recommend any of the other FOSS ones, especially one that handles our glorious emotes well?
Jerboa for me. I like the UX better than anything else. I switch to Firefox to post emoji. It’s a pain in the ass, but it works.