Cirrus, floating notes for Mac

Cirrus keeps a note one keystroke away. Press ⌃⌘N in any app and a note floats above it; press Esc and it's gone. Notes can also live in a small pill on the screen edge, or in the notch on a MacBook, where hovering peeks the note open.

Notes are Markdown with the symbols hidden: headings, checklists, highlights, code, tables and images, plus [[links]] between notes, #tags, folding, and inline math with units, dates and currencies. A command palette (⌘K) and browse (⌘P) make everything a keystroke away. Notes sync through your own iCloud with no account, and export as Markdown files.