Glad you guys stepped in. I'm new to all this legalese, and not a developer. I do work with alot of developers, and had this question asked for a project that sounds perfect for Qt. If I'm hearing right, as long as I'm using the standard libraries of Qt embedded into the supported platforms, it is free, but if you add new libraries or edit any of those present, and don't want to share it, it costs? Am I getting the right idea, basically? Trying to understand this so I can explain to my collegue. Many developers are confused about this very thing, and so am I.