Molecules is an application for the iPhone and iPod touch that allows you to view three-dimensional renderings of molecules and manipulate them using your fingers. You can rotate the molecules by moving your finger across the display, zoom in or out by using two-finger pinch gestures, or pan the molecule by moving two fingers across the screen at once. The combination of the iPhone / iPod touch's unique multitouch input system and the built-in OpenGL ES 3D graphics capabilities enable you to feel like you are manipulating the molecules themselves with your fingers.

New molecules can be downloaded from the RCSB Protein Data Bank (http://www.rcsb.org/pdb), an international repository of biological molecules and their 3-D structures. Molecules can be downloaded directly to your handheld device and stored there for later viewing. Multiple visualization modes can be switched to by double-tapping on the 3-D rendering.

Molecules' source code is available under the BSD license.