HostsXpert - formerly: Hoster
HostsXpert is an ultra-groovy Hosts file Manager, Editor and Helper-outter.
File Handling - Replace, Append or Merge your Hosts file(s)
Back Up - Backup and Restore, or restore the MS original Hosts file.
Editing - Add, Delete, Sort, toggle line comment (#), Swap between 127.0.0.1 and 0.0.0.0, and copy your Hosts file.
Memopad - built-in editor much like notepad for bulk editing and save as operations.
Whitelist - keeps a list of domains for easy removal from your hosts file. Domains can be added back in from the whitelist editor as well.
Download - Downloads hosts files MVPshosts and hpHosts, unzips and replaces or merges your current hosts file.
Simple simple simple - super small executable file with no installation necessary (also includes help file)
Free - it can't cost less.