May be Odoo - Git, the architecture is solid Postgresql - Python - JavaScript. Invoicing, Sales, Inventory, and so more modules are open source.

Aaaand … DD/MM/YYYY 🫠

HH from mastodon :)

Well, i don’t bother parentheses, in fact i don’t see them when reading code. But they are some kind of special because ‘palindroming’ them is a bit ‘counterintuitive’ :)

May be https://code.briarproject.org/briar, it is ‘absolutely’ local … and global :)