Invoice Ninja - Invoice Ninja is a free, open-source solution for invoicing and billing customers.
Notion Automations - Automate your Notion workflows with Zapier
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Notionery - Mental models made for Notion
GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.
Notion Pages - Discover new, productive Notion templates