This app is simple to navigate and takes you through step-by-step instructions on the correct way to treat stings, bites, shock, and more. The emphasis is on first aid and what to do until trained medical help arrives, but knowing what to do in the first few moments could prove critical to the eventual outcome. The app is free and when used from a phone you can call 911 at anytime from within the app.
NOAA Coastal Warning Display Program
Beginner's guide to terminology (PDF).