For my next project I have to use a Nokia 5110 LCD with a MSP430G2553. After searching for a while on the internet I came across RobG's SPI-based driver. It's a great driver, but the problem is that I'll be using a I2C chip in this project too, so I decided to create a bit-bang driver.
The code is extremely well documented and you should easily be able to use it for anything you want. Here's the GitHub repo: msp430-nokia-5110.