iNotepad - Write and organize all your texts and notes on Mac.
PlistEdit Pro - PlistEdit Pro is the most advanced property list and JSON editor written for macOS.
HTML-Notepad - HTML WYSIWYG editor for structured documents
plist Editor - Reads and writes both text and binary .plist files.
Notepadqq - Notepadqq is a linux clone (identical application) of Notepad++
Pref Setter - Pref Setter is an application for Mac OS X used to edit property list files.