1. Anxiety & Depression Association of America (ADAA) — adaa.org

Research-based anxiety resources, therapist finder, and self-help tools.

2. National Institute of Mental Health — Anxiety Disorders — nimh.nih.gov/health/topics/anxiety-disorders

Authoritative overview of anxiety disorders, symptoms, and evidence-based treatments.

3. Association for Behavioral and Cognitive Therapies (ABCT) — abct.org

Find CBT therapists and access evidence-based self-help resources.

4. This Way Up (anxiety CBT programs) — thiswayup.org.au

Evidence-based online CBT programs for anxiety and depression, backed by clinical trials.

5. Calm (mindfulness app) — calm.com

Widely used app with breathing exercises, sleep tools, and guided meditations with strong research support.

6. NoMorePanic — nomorepanic.co.uk

A peer-led community offering forums, personal stories, and practical information for people living with panic disorder, health anxiety, and related conditions.

7. ACT Mindfully (Russ Harris) — actmindfully.com.au

The official site of Dr. Russ Harris, one of the leading voices in Acceptance and Commitment Therapy, offering free worksheets, videos, and resources grounded in ACT principles.