Contains a comprehensive listing of various mind altering substances, including their chemical structures and effects (with first person accounts).

A non-profit source of information on the recreational use of codeine, dihydrocodeine, hydrocodone, oxycodone, and pholcodine. Includes facts, extraction guide, list of products containing codeine, information on side effects, addiction and tolerance.

Index of drugs, with physical effects, images, history, chemistry and law information for each. Articles and sections for wide variety of drug related material, including law, experiences, community, drug testing, spirituality, health, and artistic endeavors.

Portal to drug-related websites organized by topic, and a chat room.

Information, history, facts, and pictures of crack and cocaine.

Information and forum about most recreational drugs.

Allows the user to calculate how much money is spent monthly and annually on drugs, alcohol, and cigarettes.

Offers a Duncanian perspective on the nature of responsible, non-addictive use of recreational drugs, including concerns for situational, health, and safety responsibilities.

Discussion forum, photos, and user contributions.

Provides information about a wide range of recreational drugs, including their effects and historical usages.

A portal for discussion of the drug counter-culture. Featuring news, policy and health discussions, experiences, and techniques.

An international nonprofit association of people working in the public interest to protect the fundamental right to freedom of thought through the use of drugs. Includes news, law library, journal, plus organizational and membership information.

Provides database, bibliographies, reviews, and links.

Organization whose main purpose is the dissemination and production of information on substance use, addiction, harm reduction, and drug policy.

Focuses on drug policies in the United Kingdom and global cannabis news and harm reduction information. Also sells Ecstasy testing kits and books.