Apple Notes or macdown (https://macdown.uranusjr.com/ https://macdown.uranusjr.com/) or even just vim + grep (maybe fzf also) have been the easiest for me, and

Apple Notes or macdown (https://macdown.uranusjr.com/ https://macdown.uranusjr.com/) or even just vim + grep (maybe fzf also) have been the easiest for me, and they don't require an internet connection