It's a market! Kindest seems to have staying power: https://www.kindestapp.com

I first thought to share Clay (https://clay.earth) but I see they were acquired by Automattic recently.

Monica CRM is one too, it sits abandoned on my still powered on raspi zero w because I don't have a queue habit set up to cause me to go check it, but it was nice as a digital personal Rolodex with more automation than just contacts app that's barely more than a vcard