3DNA: A Software Package for Analysis, Rebuilding, and Visualization of Three-dimensional Nucleic Acid Structures.

3DNA was created by Dr. Xiang-Jun Lu at Dr. Olson's lab at the Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey.

You can find more information and dowload Version 1.5 at:
3DNA V 1.5
You can find the LATEST homepage for 3DNA at:
3DNA V. 2.0 Homepage
You can download Version 2.0 of 3DNA at:
DOWLOAD 3DNA V. 2.0
You can also find the new web version of 3DNA (w3DNA) at:
Web3DNA