Headspace - Meditation made simple. Brilliant things happen in calm minds.
EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
Calm - Calm.com can help you reduce stress and increase calm.
Meludia - Listening exercises and to sharpen your ear and music theory skills
Synctuition Meditation Program - Synctuition Meditation Program is a world’s most leading meditation app that comes with brand new 3D sounds that enhance the quality of sleep significantly.
GNU Solfege - GNU Solfege is free music education software.