What's Your Customer Success Stack?

Hi all, 

Super happy to have found this great community so I can both share and learn. One of the things developer's often talk about is their "Stack", or, the tools they use to produce products/solutions.

I was curious what other CSMs use to do their jobs and what "stack" of tools/products, etc. do you find to be most useful. I also wonder what role the big CSM products (Gainsight, etc.) play in the ecosystem of tools. 

So what is the tool set (stack) that you use and have refined over the years?