Notepin - Extremely simple note-taking + blogging ✍️
PlistEdit Pro - PlistEdit Pro is the most advanced property list and JSON editor written for macOS.
TaskPaper - Plain text to-do lists for Mac
plist Editor - Reads and writes both text and binary .plist files.
Jot - The no-fuss way to take notes
Pref Setter - Pref Setter is an application for Mac OS X used to edit property list files.