CleanOpenWith

CleanOpenWith is a simple AppleScript to keep clean the OpenWith menu on OS X. This app is very easy to use: Open Terminal (Applications / Utilities / Terminal.app) and
Type in the following command : /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -r -domain local -domain system -domain user.