Plum Village - Free mindfulness app w/ Zen Buddhist meditations + teachings
FlowVR - Virtual reality app with highly effective guided meditations
Calm - Calm.com can help you reduce stress and increase calm.
Headspace - Meditation made simple. Brilliant things happen in calm minds.
Timeless | Meditation - Personal practice meditation timer with guided instruction and multi-day courses.
Calmind - Be smarter, less stressed, and healthier—just by listening!