Calm - Calm.com can help you reduce stress and increase calm.
Untools - Hand-picked tools for better thinking
Pacifica - Stress and anxiety relief through beautiful CBT tools
Super Thinking - The big book of mental models
Synctuition Meditation Program - Synctuition Meditation Program is a world’s most leading meditation app that comes with brand new 3D sounds that enhance the quality of sleep significantly.
Notionery - Mental models made for Notion