Product: from 0 to 1 Learn, Book Product Mindset: https://www.productschool.com/product-mindset-book Plan https://www.leanservicecreation.com/ Estimate: https://buildmymvp.com/ Design: https://www.checklist.design/ Content Creation: https://www.hiscribble.com/ Backend: https://github.com/anttiviljami/openapi-backend Testing: https://www.cypress.io/ User Testing: https://www.usertesting.com/ Security: https://snyk.io/ Error Report: https://sentry.io/ Automation: https://greenkeeper.io/ Landing Page: https://cruip.com/ Validatation: The fast & visual way to understand your users: https://www.hotjar.com Audit: Easily audit your website: https://webaud.it Deployment: https://www.netlify.com/ Onboarding User: https://userguiding.com/ Engage User: https://www.intercom.com/ Other resources: https://ethical.net/resources/