Perhaps there's something you use that you could also contribute to? Like a framework on addon used for one of your projects? Or something that you missed while creating them?
Well okay so that would take more time for me to use it at first, I mean I am using Node.js/Express.js and also all the other libraries that are needed to use for an web app like Passport, Bcrypt, body-parser, etc. but it seems I need to have a great understanding to do that.