What is in your Product discovery Tech Stack ?

What tools are you using to help you on your customer development and product discovery efforts? I've compiled a list of products here I've been using: (https://www.producthunt.com/@dqu...) - Mixpanel - Unbounce - Roadmunk - Hotjar - Notion - Figma - Calendly - Zoom - Typeform - Ferilla Discovery (not just using it but build it too...) but wanted to know what others are doing :)