LibreOffice comes to mind immediately as the most high-profile one I can think of. That aside, any permissively licensed library used in a GPL program would te

LibreOffice comes to mind immediately as the most high-profile one I can think of. That aside, any permissively licensed library used in a GPL program would technically fall under this situation, as it ends up distributed under the terms of the GPL. It just so happens that usually the libraries aren't modified by the application developer, so you can typically go find the original source. If they are, those changes may be under the GPL, depending on whether the application developer kept the derivative version of the library explicitly under its original license, or licensed their changes under the application's license.