Auto-DUD-E is a website for a test set of ligands & decoys for molecular docking.
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0075992 for citation information and more about these files
http://autodude.docking.org/ is the home of the original version.
Unfortunately, the ligand database files are too large for github, they are available at the site above.