Calm - Calm.com can help you reduce stress and increase calm.
Headspace - Meditation made simple. Brilliant things happen in calm minds.
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.
Plum Village - Free mindfulness app w/ Zen Buddhist meditations + teachings
MoveWell - Personalized mobility trainer inside your mobile device. Get stronger, recover faster and MoveWell.
Smiling Mind - Promotes mindfulness and meditation for young people