Even though I am not exactly there yet, I often like to classify myself as a Libre Source Developer. Let's get into this terminology first.
Libre Source, for the most part, is very much in parallels with Open Source Development: i.e., people can see the source of your code, fork it, compile it, and distribute it. There exist different licenses that lay down the permissions for what most users can do with it. The most popular, in the Open Source world, is the MIT License