JWPubLib is a collection of Public Domain Bible reference works and study projects packaged as .jwpub archives that can be added to the JW Library app¹ - as one would supplement/complement a physical library (personal or in a Kingdom Hall) with an atlas, dictionaries, and other such secular publications. Or, if you prefer a food analogy, these "unofficial" packages are not the meal, but the non-essential extras, like napkins and candles, or like the hot-sauce some take with them to a restaurant :-) The material is not copyrighted and is packaged with open-source tools and technologies.