The Free Law Project has recently announced that in collaboration with the U.S. Department of Labor and Georgia State University, they have collected every free written order and opinion that is currently available in PACER.
New opinions will be downloaded every night (!) to keep the collection up-to-date.
Currently, the collection contains about 3.4 million orders and opinions from cases dating back to 1960. All of the documents are available for search, and the Free Law Project has also partnered with the Internet Archive to upload a copy of every opinion as well (the Internet Archive is a non-profit whose mission is to permanently store digital content).
Read more about this exciting new initiative here.