I've recently started work on the MVP of featurequest.
The idea for the product is to allow website owners to embed a button/widget on their site that allows users to submit feature requests, or vote on a set of possible upcoming features curated by the site owner.
I'm relatively certain that there are existing products out there that provide the same or similar functionality, but I'm a developer, so why not build it myself? ;)
As I have a couple of other side projects that I'm working on simultaneously, this one may be somewhat on the back-burner.