Untools - Hand-picked tools for better thinking
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Mental Models - Thinking tools to help you navigate life better
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Notionery - Mental models made for Notion
Slack - A messaging app for teams who see through the Earth!