Demonoid is a famous bit torrent tracker, which was down for almost two years due to many legal (Ukrainian authorities) and other issues (DDoS attack). They are back now on a new cloud based hosting space. As usual the registration is closed and you will need an invitation to create a Demonoid account.
The Demonoid Website Says
After some well deserved vacations, here we are, back online.
The site is now cloud based and there have been many changes to the code. As a result, you might see some weird glitches here and there. We'll do our best to have everything working smoothly as soon as possible so please bear with us.
The guys from the site staff are already back, please take a moment to visit our forums and say hello. As before, the forums are separate from the main site login so you will need to register there separately.
Check it out here