RARBG, which started out as a Bulgarian tracker, was last year’s newcomer and continues to rake in more visitors. The site was blocked by UK ISPs last month, which put it on par with most other sites in the top 10.
Isohunt.to was launched in 2013, less than two weeks after isoHunt.com shut down. The site is not affiliated with the old isoHunt but hopes to keep its spirit alive. The same people are also behind Oldpiratebay.org, which is is listed in 4th place.
1337x is a community driven torrent site. The site’s owners say they launched 1337x to “fill an apparent void where it seemed there was a lack of quality conscience ad free torrent sites with public trackers.” This year the site dropped its .org domain and is now operating from 1337x.to.
Limetorrents.cc has been around for several years already, and regained a spot in the top 10 this year. The site appeared in the news this summer after it was sued by LionsGate for posting a link to a leaked copy of The Expendables 3. The case is still ongoing.
Disclaimer: Thanks to torrentfreak for the list