Hostess is a free utility for maintaining your HOSTS file. Unlike many HOSTS file utilities, Hostess is geared towards ad-blocking rather than IP address resolution. Hostess stores your host entries in a database that is indexed to eliminate duplicates and make searching fast and easy. It also allows you to group these hosts for efficiency and ease of maintenance.
Messing with the HOSTS file is not for the inexperienced user. There is the possibility of undesirable and sometimes difficult to troubleshoot effects on your Internet and network connectivity.