I've added support to Visual Studio 2017 to all my extensions.
I am dropping support to VS2013, so it is all about VS2015 and VS2017 support.
Antlr4Code for VS2015/2017
Antlr4Code is a free VS 2013/2015 extension which I quickly wrote so we have a minimum of editing support for ANTLR4 grammars inside Visual Studio.
Right now it is pretty basic stuff, nothing too fancy, but the essential stuff is there: