Untools - Hand-picked tools for better thinking
Agenda - A date-focused note taking app for both planning and documenting your projects.
Super Thinking - The big book of mental models
Notepin - Extremely simple note-taking + blogging ✍️
Mental Models - Thinking tools to help you navigate life better
Bear - Bear.app is a note-taking and content writing app that helps you boost productivity with its intuitive tools.