My favorite tools I’ve used:
https://www.grammarly.com/affiliates
https://prowritingaid.com/en/Affiliate/Program
https://eu.siteground.com/affiliates
https://www.canva.com/affiliates/
https://www.mailerlite.com/affiliate
https://www.shutterstock.com/explore/affiliates
https://depositphotos.com/referral.html?asxh=1
https://affiliates.fiverr.com/
https://www.scribendi.com/becomeaffiliate
https://www.notion.so/affiliates