PlistEdit Pro - PlistEdit Pro is the most advanced property list and JSON editor written for macOS.
plist Editor - Reads and writes both text and binary .plist files.
Pref Setter - Pref Setter is an application for Mac OS X used to edit property list files.
Mac OS X Prefs Editor - Edit preferences of any application. Like the 'defaults' command in Terminal.
Filza File Manager - Explore files and folders with list view or grid view. View / edit files with powerful viewers.
Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.