A driver library for the color LCD arduino shield from ElecFreaks, a Nokia 6100 display with a Philips PCF8833 controller. It meant to be a drop-in replacement for the library you can download from ElecFreaks (http://www.elecfreaks.com/store/color-lcd-shield-p-462.html).
The ElecFreaks shield is based on SparkFun Electronics' Color LCD Shield (http://www.sparkfun.com/products/9363). That shield sometimes uses another driver circuit, an Epson S1D15G00.
The user manuals for the driver circuits can be downloaded from:
Philips/NXP PCF8833: http://www.nxp.com/acrobat_download/datasheets/PCF8833_1.pdf
Epson S1D15G00: http://www.sparkfun.com/commerce/product_info.php?products_id=569