Insight Timer : timed, guided meditations
Ten Percent Happier: Meditation and sleep app
Take a Break: guided relaxation meditation
Calm: guided relaxation sessions and nature scenes
Headspace for Students: mindfulness and meditation exercises
Penzu: start a gratitude journal
Breathe2Relax: portable stress management tool
My3: suicide prevention
MyLife: personalized mindfulness activities based on how you are feeling right now