Erowid is a non-profit organization that provides information about many psychoactive plants and chemicals.
http://www.erowid.org/psychoactives/psychoactives.shtml
Erowid’s comprehensive page on MDMA (Ecstacy).
http://www.erowid.org/chemicals/mdma/mdma_faq.shtml
EcstasyData.org was created to “collect, manage, review, and present laboratory pill testing results from a variety of organizations.”
http://www.ecstasydata.org
Drugs-forum is an “information hub of high-standards and a platform where people can freely discuss recreational drugs in a mature, intelligent manner.”
http://www.drugs-forum.com
In-depth information about cannabis.
https://www.cnbs.org
Trip Project has a long history of providing useful drug and health information.
http://www.tripproject.ca
TripSit’s mission is to provide open discussion of harm reduction techniques and positive support. They promote the use of harm reduction tools such as test kits, and offer guidance and support with regards to harm reduction when using drugs.
http://tripsit.me
TripSit also has a useful wiki:
http://wiki.tripsit.me/wiki/Main_Page
DrugRehab.com provides information and answers for people fighting addiction.
https://www.drugrehab.com
The U.S. Department of Justice technical document specifying the standards for color test kits for the identification of drugs.
https://www.ncjrs.gov/pdffiles1/nij/183258.pdf
Our results page you can see the color reaction results you can expect when testing many different drugs.
https://testkitplus.com/drug-test-kit-color-reaction-results
For those interested in the major studies of drugs and drug policy, the Schaffer Library of Drug Policy contains a huge collection of documents.
http://druglibrary.org/schaffer
