Software programs that allow you to legally copy files and give them away are called what?

http://en.wikipedia.org/wiki/Open-source_software

Software programs that allow you to legally copy files and give them away are typically called file sharing or peer-to-peer (P2P) software. These programs enable users to share digital files, such as documents, music, videos, and more, with other users who have the same software installed on their devices. The most commonly known P2P software is BitTorrent client software, such as uTorrent or BitTorrent. These programs utilize a distributed network of users to download and upload files, making it possible for individuals to legally share files they have permission to distribute.