Looking for resources for SaaS orgs

Hey all, I'm putting together a list of Airtables (giving credit to their creators) that business leaders at early-stage SaaS companies would find helpful. Any suggestions to add to the list? Here's what I have so far: https://airtable.com/shrDFxko2jjjeCUqw/tblLXQLZWOJkJ9Oft/viwQr5JKDzsSsN44U