H.A.C.K.

http://www.hostelworld.com/hosteldetails.php/Unity-Hostel/Budapest/16789
http://www.hostelworld.com/hosteldetails.php/Activity-Hostel/Budapest/25261
http://www.hostelworld.com/hosteldetails.php/Adagio-Hostel/Budapest/24406
http://www.hostelworld.com/hosteldetails.php/Big-Fish-Hostel/Budapest/29308
http://www.hostelworld.com/hosteldetails.php/Thumbs-Up-Hostel/Budapest/32952
http://www.hostelworld.com/hosteldetails.php/MetroMM/Budapest/40756
http://www.hostelworld.com/hosteldetails.php/Yep-Hostel/Budapest/23233
http://www.hostelworld.com/hosteldetails.php/7x24-Central-Hostel/Budapest/21085

http://www.grundhostel.hu/
http://www.marcopolohostel.com/