Discipline Specific
3D Brain (free)
Use your touch screen to rotate and zoom around 29 interactive structures. Discover how each brain region functions, what happens when it is injured, and how it is involved in mental illness.
Molecules (free)
Pocket Universe: Virtual Sky Astronomy ($1.99)
Science360—National Science Foundation (free)
Related Reading
Maths iPad Apps (List of both free and paid apps)