Ask HN: What tools are you using for customer development experiments?

This question is specific to web startups. What tools are you using to keep track of customer dev experiments?

How are you tracking experiments?

What are you using for reporting?

Are you building your own forms, or using a tool like Wufoo?

Are you creating your own landing pages, or using a prebuilt tool?

And so on. I've been spending time on integrating our site with landing pages, with a home grown customer dev tool etc, and I'm stuck wondering if there are off the shelf solutions for all this.