Yes there are many applications that are already available. Skyscape and Unbound have web apps that may be viewed if you are connected to the internet. I am trying to figure out how to use these applications while offline.
This thread is super-old, but since practically everyone's got an iPhone/iTouch/etc I wanted to see if anyone has any good suggestions for iPod Touch apps for nursing students/students in general! I'm getting an iPod Touch in the next few days and would love suggestions, especially free stuff! =D