As the drug discovery and development arm of the National Cancer Institute, the Developmental Therapeutics Program (DTP) plans, conducts, and facilitates development of therapeutic agents for cancer and AIDS. We are your resource for research materials, including Web-accessible data and tools, vialed and plated compounds, tumor cells, animals, and Investigational New Drug (IND)-directed studies.
There are several lists of pages linking to downloads, including:
At least some material may be in the public domain as producerd by US Federal Government department. However, on the Disclaimer page it says:
In addition, the U.S. Government, NIH, NCI and their employees and contractors assume no legal liability for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed herein and do not represent that use of such information, apparatus, product, or process would not infringe on privately owned rights.