The key to building developer tools is to build the ones that a developer needs but has no interest in creating. Backend for mobile, infrastructure for backend,

The key to building developer tools is to build the ones that a developer needs but has no interest in creating. Backend for mobile, infrastructure for backend, etc. Just don't create front end tools for front end developers, for example. Firebug had a donate button and we funneled all of it to volunteers in places where the currency was weak to make it at least seem material.