Plugin like Kampyle?

I’m just wondering if anybody knows of a plugin that can be used as an alternative to Kampyle, which I use to gather feedback from site visitors. I’m on the free package at the moment and would like a bit more functionality, but can’t afford/ justify the amount to upgrade. The functionality of Kampyle doesn’t seem to be anything particularly special that a plugin couldn’t do, by the looks of things, which leaves me wondering… Are there any plugins out there that I can use that will allow me to collect feedback from my visitors?