Notepin - Extremely simple note-taking + blogging ✍️
Whimsical Sticky Notes - Visual project management using sticky notes
TaskPaper - Plain text to-do lists for Mac
Jot - The no-fuss way to take notes
Gone - An ephemeral to-do list
FoldingText - FoldingText is a feature-rich text editor for Macs with a built-in markup language. It allows users to easily create lists, checklists, bold text, and headings. Read more about FoldingText.