Ask HN: Specific Ask HN thread quetion

Is there a producthunt or hackernews type system for these specific Ask HN threads: https://news.ycombinator.com/item?id=11739183 I'd like to see the best, most complete, most well thought out ideas of apps that should be built and are "shovel ready" i.e. ready to go. And then when programmers are board, they can go and open source like, just take the idea they like the best and build it.