Therapeutic Target Database (TTD) is a database to provide information about the known and explored therapeutic protein and nucleic acid targets, the targeted disease, pathway information and the corresponding drugs directed at each of these targets.

ChEMBL is a manually curated database of bioactive molecules with drug-like properties. It brings together chemical, bioactivity and genomic data to aid the translation of genomic information into effective new drugs.

STITCH is a database of known and predicted interactions between chemicals and proteins and a functional enrichment tool.

DrugCentral provides information on active ingredients chemical entities, pharmaceutical products, drug mode of action, indications, pharmacologic action.

DrugBank Online is a comprehensive, free-to-access, online database containing information on drugs and drug targets.

ZINC15 is a free database of commercially-available compounds for virtual screening. ZINC contains over 230 million purchasable compounds in ready-to-dock, 3D formats. ZINC also contains over 750 million purchasable compounds you can search for analogs.

DrugEnrichr is a new drug set enrichment analysis tool.

The Open Targets Platform is a comprehensive tool that supports systematic identification and prioritisation of potential therapeutic drug targets by integrating publicly available datasets including data generated by the

PubChem, an open chemistry database at the NIH, mostly contains small molecules, but also larger molecules such as nucleotides, carbohydrates, lipids, peptides, and chemically-modified macromolecules.

Drugmonizome is a web portal for querying sets of known drugs and computing significant biomedical terms that drugs in the set share.

LDP 2.0 includes data about over 20,000 small molecules, including approved drugs, compounds in clinical trials, and tool-compounds. Chemical structures are searchable by substructure.

PharmGKB is a comprehensive resource that curates knowledge about the impact of genetic variation on drug response for clinicians and researchers.

PubMed comprises more than 33 million citations for biomedical literature from MEDLINE, life science journals, and online books.

Drugs.com is the largest, most widely visited, independent medicine information website available on the Internet. Drug.com's aim is to be the Internet's most trusted resource for drug and related health information.

Drugs@FDA drug cards provide the most recent information from approved drug labels, including regulatory, safety and effectiveness information.

The Guide to Pharmacology is a searchable database of drug targets and the prescription medicines and experimental drugs that act on them.

MedChemExpress (MCE) offers a wide range of high-quality research chemicals and biochemicals (novel life-science reagents, reference compounds and natural compounds) for scientific use.

SigCom LINCS data portal serves LINCS datasets and signatures. It provides a signature similarity search to query for mimicker or reverser signatures.

Wikipedia is a free content, multilingual online encyclopedia written and maintained by a community of volunteers through a model of open collaboration, using a wiki-based editing system