What is a privacy friendly application that you'd love to have, but no one has developed yet?

For project management there's quite a few, Taiga.io and Plane.so look the most promising to me.
Idk about CRM though, even after reading what is, I still don't exactly get it

Project management: Projeqtor

CRM: Dolibarr

Both: Odoo

I use SugarCRM when I need a quick and dirty CRM. There are various open source forks. Its fairly easy to integrate. There are a few other FOSS CRM options, too. Never tried them but OnlyOffice has one, GNU Enterprise, SuiteCRM, Dolibarr, etc

https://en.m.wikipedia.org/wiki/Comparison_of_CRM_systems

IMO, the move would be to pick one and build integration for FOSS PM tools.