Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Joy - Spend Happier & Build Your Savings
LaTeXDraw - LaTeXDraw is a graphical drawing editor for LaTeX.
Whole - Self care habit builder to improve your mental health
Ipe - Ipe is a drawing editor for creating figures in PDF or (encapsulated) Postscript format.
Grapefruit - An app for managing your mental health