Cuely - 1-min guided exercises to stay well all day with reminders
Plum Village - Free mindfulness app w/ Zen Buddhist meditations + teachings
Calm - Calm.com can help you reduce stress and increase calm.
stndup - Reminds you to take a break from work once in a while
Headspace - Meditation made simple. Brilliant things happen in calm minds.
Calmind - Be smarter, less stressed, and healthier—just by listening!