Agora (client I'm working on): https://agorasocial.app
Snort: https://snort.social
Iris: https://new.iris.to
Nostribe looks promising!: https://nostribe.com
Discussion
Who decided the name speaks what language? Because in Portuguese “agora” means “now”
Agora means "now" in Portuguese but "Ágora" means the same both in English and Portuguese: a public space where the public discourse takes place.