I shipped a new iPhone app a few weeks ago - "Resistor Photo ID"
It uses your iPhone's camera to help identify resistor values.
(check out my other iPhone apps here)
I specifically developed it with color blind people (like myself) in mind - who can't successfully ID resistors even if they take the time to learn the color codes.
Click here to get it from the Apple App Store (currently free!).
Using resistor ID is easy:
1. Take a photo of a 4-band resistor using the app
2. Drag the numbered bars over the corresponding resistor bands
3. Resistor Photo ID provides you with the resistance and tolerance of the resistor!
If for any reason Resistor Photo ID doesn't detect the correct color for a band - you can easily override it.