Gas Mask is simple hosts file manager for Mac OS X Snow Leopard & Lion. It allows to edit hosts files and switch between them.
Editor with syntax highlighting
Gas Mask features editor with syntax highlighting. It will help you track down errors in hosts files.
Remote hosts files
Adding remote hosts files to Gas Mask is easy, and they will be updated automatically.
Hosts files can be switched simply by pressing hotkeys.
Support for Growl, the global notification system.
Licensed under the GPL. Gas Mask source code is freely available to anyone.
Gas Mask checks for updates automatically and notifies when new version is available.
Mac OS X 10.9,
Mac OS X 10.10,
Mac OS X 10.8,
Mac OS X 10.7