plist Editor - Reads and writes both text and binary .plist files.
PlistEdit Pro - PlistEdit Pro is the most advanced property list and JSON editor written for macOS.
Mac OS X Prefs Editor - Edit preferences of any application. Like the 'defaults' command in Terminal.
Clover Configurator Pro.app - Free Plist Editor on macOS
Eddie - Eddie is a programmers editor for Mac OSX and Gnome Linux.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft