Optimism Mental Health App

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Application that tracks mood, triggers, healthy activities, and shows graphs. Available in multiple platforms. It's my favorite tool.

Bipolar Disorder in Adults

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Overview of bipolar disorder from the National Institute of Mental Health

Goldberg Bipolar Sprectrum Screening Questionnaire

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Informal 12-question screener for bipolar disorder (assuming you have already had one or more episodes of clinical depression)

Mood Swings Without "Manic" Episodes

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Excellent set of resources compiled by Dr. Jim Phelps (pictured here), a board-certified  psychiatrist. He has also written a bunch of books and articles on mental health.

Understanding Bipolar Disorder and Recovery

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Brochure on Bipolar Disorder from National Alliance on Mental Illness