Ask HN: Fancy Tech in Search of a Business Case

Dear HN,

I wonder if anyone has a good idea on how to turn cool technical solutions (in search of a problem) into an actual product.

By now, I have collected quite a list of cool things where I'm sure they will be useful for someone, but I have no idea for how to productize them. And I'm sure there will be many others in here who have cool tech in their basement that they built for themselves, but that might be of value to others, too.

So I wonder if just like how there are freelancing job boards, are there any job boards for product ideas?