You can download just about anything from torrent sites. There are countless computers out there with shared files. People compress huge software packages and offer them for download. Exact matching files shared across thousands of computers make them instantly available around the clock because there are always many out there with the same shared files on computers that are turned on and connected to the Internet. The key is in finding the file you want. I have been using http://en-torrentz.com.
I am a researcher who is writing a book on the evolution of specific types of software since their inceptions. I am looking at old and new word processing programs, photo editing software and games. I am tracing how these products evolved commercially since their first releases. I am looking at how each new version release dealt with bugs in the prior releases. The goal is to show the public how they are participating with their dollars in the dynamic development of computer software.
The bit torrent sites pretty much have every piece of software available if you have a good search software to find what you are looking for. The really old stuff has been out of production for more than two decades. I like to do more than just read about the old versions, I like to try them out on old computers. It really helps in writing my book to have actually used the old software. I actually have some very old versions of software, but my library is far from complete.
The big thing with me trying to get the files from a peer-to-peer network (P2P) has always been slow download speeds. I have a fast data connection, but the P2P networks I connected to were always very slow. It could take hours for a compressed software package to download. Finding a better torrent search engine with super fast download speeds has been a real help.