Cornell's DigitalCommons@ILR repository, which serves the ILR School (also known as the School of Industrial and Labor Relations), has had nearly two million downloads and contains close to 10,000 documents.
Here's an excerpt from the press release:
Featuring the scholarship of ILR faculty and researchers, DigitalCommons@ILR also contains workplace-related collections selected by Catherwood staff. Collection items include collective bargaining agreements, records of Congressional commissions and archives of labor and globalization-related web sites. . . .
The most downloaded items in the repository include works by ILR faculty, archived issues of the ILR Review and reports from the Congressional Research Service.