LiveHosts

LiveHosts is a Chrome extension that aims at providing a working (even if sub-obtimal) solution to a common nuisance that many web developers have to deal with every day. If you have multiple versions of your websites sharing the same host names on multiple environments, you often need to switch the assignments in your OS hosts file.

Other extensions (like the life-saving HostAdmin) can help with the cumbersomeness, but changes to the hosts file usually take an inconvenient amount of time to actually affect the browser.

Unfortunately, there is no way to make Chrome direct requests for a hostname to a specific IP without a standard redirect - you could set up a smart HTTP proxy, but it's often not possible or not convenient.