Ask HN: What “missing” technical solution(s) do you wish existed?

This could be just about anything, from "project A but written in language B", "an API or library for real world activity C", "a unified solution for both D and E", all the way to "An open source version of proprietary solution Z", etc.

Go wild, dream big. You never know, someone might respond with a link to such a project that already exists... or decide to start one!