Although torrenting is often associated with illegal activity, there are many legitimate uses of uTorrent and the BitTorrent protocol in general:
Viewing content from the Internet Archive
The Internet Archive is a nonprofit organization dedicated to making published works available on the internet, including old versions of webpages, live TV news videos, and full-length public domain films, music, and books. You can download many of the larger files in torrents, which helps keep the archive’s bandwidth costs low.
Downloading Linux distributions
Most popular Linux distros, including Ubuntu, Debian, and Fedora, provide torrent files as an alternative download method.
Enjoying music and videos from independent artists
BitTorrent’s official website has a section called BitTorrent Now where you can find torrent files for hundreds of albums and videos from independent artists. Most offer a free sample and a full paid version.
Exploring academic datasets
Academic research often generates datasets with very large file sizes, which makes them ideal for torrenting. Academic Torrents is a good general source for browsing scientific torrents, including a section featuring data from NASA.