Life+ is an application that helps your to publish a distress on your Facebook timeline and mentions your friends to attract their attention that you are in an emergency case and you need their help.
You can save a template for each emergency case you may face and determine which Facebook friends you want to mention in each case ( Of course who can help you the most in that case) and publish it directly.
The distress will contain a URL with your location on Bing Maps with brief details about your emergency case.