As a developer it's very hard to see what kind of software normal people find useful. I happened to overhear a conversation about Dropbox, the idea that you cou

As a developer it's very hard to see what kind of software normal people find useful. I happened to overhear a conversation about Dropbox, the idea that you could read-only share a document was simply amazing to them. I rolled my eyes then. But also knew at that moment that Dropbox would become very popular.