The Diagnostic Imaging Atlas (DIA) from Webster Veterinary provides high-quality illustrations of normal biology and pathologies for both cats and dogs. It is useful as a reference for Veterinary students, as well as a useful tool for educating clients about pet pathologies. You can find it in the Application Store by searching for "DIA".
This blog article from a first-year nursing student discusses iPod Touch / iPhone applications useful for nursing students. You can read about it at http://www.brainscramble.org/?p=219.
Epocrates Rx is an excellent resource for students in the medical field (doctors, nurses, pharmacy etc.) including a drug handbook, drug interactions, pill identification, medical calculators, and access to latest news published in medical journals.
Be warned that this is an American program. Some of the drugs listed may be slightly different in Canada. The program requires that you register for a free account on the Epocrates web site.
You can find more information at http://www.epocrates.com/products/iphone.html
The "Random Pose" application (search for it in the App Store) is an excellent resource for art students. It contains over 19000 different reference poses for drawing study. Each image is of a male or female subject with the skin removed, showing the underlying musculature.
When you start the application, it shows a random pose. "Next' and "Previous" arrows allow you to move through the images until you find one you like. Use it as a source to draw from, or as a guide to show live models how you want them to pose.
The images come from the Posemaniacs web site. You can see it at http://posemaniacs.com/ along with a description of the iPhone / Touch app.
Brain Tutor 3D (search for it in the app store) is a great example of how the iPhone / Touch can be used as a teaching tool.
This free application lets you explore the brain. Select the structure in the brain you want to view. A description of the structure appears. You can then view a rotatable 3D model of the left or right hemisphere of the brain with the structure highlighted.
But it doesn't stop there. Select the "head" icon and you can see a 3D head. Selecting options lets you rotate the head and position it on your screen. But the best option is the "cut away" view. Select that, then slide your thumb across the screen. This will take you layer by layer through the brain using MRI scans which I assume came from the "Visible Human Project". You can select cross sections from front to back, side to side, or top to bottom.
Not only is this educational, but it makes excellent use of the iPhone / Touch user interface.
My Biotech Life released a list of the top ten apps they think are useful in the life sciences. You can see them at http://my.biotechlife.net/2009/01/20/top-10-life-science-related-apps-for-the-iphone-and-ipod-touch/.