OneMail complements the built in Mail.app by allowing you to keep all your mail with you on your iPhone or iPod Touch and perform full-text searches to find any message in seconds. Get OneMail from the iTunes App Store.

VertiGo: a unique, interactive personal trainer on your iPhone or iPod, to guide you through vestibular rehabilitation for dizziness. Get VertiGo from the iTunes App Store.

Dermatomes is a handy reference map of which spinal nerve roots relay sensation from particular areas of the skin. Get Dermatomes from the iTunes App Store.

OptOK is a universal toolkit for eye examination that includes acuity, reading and optokinetic nystagmus tests. Get OptOK from the iTunes App Store.

Myotomes is a quick reference guide to the neurological motor examination. It lists the commonly tested movements of the upper and lower limbs, and the nerve roots, muscles and nerves that they test. Get Myotomes from the iTunes App Store.