DanceSafe offers drug information and education along with other harm reduction information
Erowid includes information about a variety of substances, including experience reports
On Psychedelic Integration and Harm Reduction
Books & Workbooks
Beyond the Narrow Life: A Guide for Psychedelic Integration and Existential Exploration by Dr. Kile Ortigo
After the Ceremony Ends: A Companion Guide to Help You Integrate Visionary Plant Medicine Experiences by Dr. Katherine Code
Integration Workbook: Planting Seeds for Growth and Change by Kyle Buller & Joe Moore
Consciousness Medicine: Indigenous Wisdom, Entheogens, and Expanded States of Consciousness for Healing and Growth by Francoise Bourzat
Websites
Psychedelic Support Network offers free courses which can be accessed here
Dr. Ben Malcolm, the Spirit Pharmacist, offers psychopharmacology consulting and psychedelic education, including webinars and one-on-one consultations