What is your favourite Growth Marketing tool

Recently I have constantly come across new and innovative way to tackle growth marketing, and am very curious if there are more products we could share with each other. I stumbled upon this gem today from product hunt while looking at what projects hunters have hunted (Not my product nor any relation to it please do not ban me product hunt team) https://honeypot.so Lets try and make a really good list of products we can leverage to help all our fellow marketing builders!