Brain.fm - Music designed for the brain to enhance focus, relaxation, meditation, naps and sleep within 10 - 15 minutes of use.
Divuni - Daily questions - A social mindfulness platform
Calm - Calm.com can help you reduce stress and increase calm.
Notepin - Extremely simple note-taking + blogging ✍️
Medito - 100% Free Meditation App that will improve your Mental wellbeing with the help of Guided Meditations, Breathing Exercises, Mindfulness Practices, Relaxing Sounds, and more.
A5 - Takes notes in your browser. Elegant & simple.