Have you ever wondered what happens if there is a serious situation and you need an automated external defibrillator? According to Wikipedia:
An automated external defibrillator or AED is a portable electronic device that automatically diagnoses the potentially life threatening cardiac arrhythmias of ventricular fibrillation and ventricular tachycardia in a patient, and is able to treat them through defibrillation, the application of electrical therapy which stops the arrhythmia, allowing the heart to reestablish an effective rhythm.
Now Lucien Engelen from the Radboud University Nijmegen Medical Centre, The Netherlands launched a great project, AED4EU. Users can add places where AEDs are located and this database can be accessed through a new application, AED4EU on your mobile phone. You can also follow them on Twitter.
I use it on my Android via Layar reality browser.