Humin (formerly Healthy Minds Innovations)
Nonprofit founded on Dr. Richard J. Davidson's wellbeing research at the University of Wisconsin–Madison. The free Healthy Minds Program app teaches awareness, connection, insight and purpose through short guided practices, alongside a free Emotional Style Quiz. The organisation also sells courses, workplace programs and paid research services, and takes donations.
Why I recommend it: The app is free with no paid tier inside it, which is rare here — worth having if burnout is part of your job search. Two honest flags: the courses, workplace programs and retreat studies on the same site are paid, and much of the evidence cited is the founder's own research group examining its own program, so read outcome claims as promising rather than settled.