Great tools for running a Tech startup

I like Buttondown's Notion page of Running Costs. It's a Django web app that does it's job very well so it's nice that it includes both all the tools used, how and their costs.

https://www.notion.so/buttondown/Running-Costs-f29729ded5494...

I'd love to see more companies being this transparent. Maybe even make an awesome list. Currently I know of just Buttondown.