This is a library for Monochrome OLEDs based on SH1106 drivers (warning: only SPI has been tested!)

  Pick one up today in the adafruit shop!
  ------> http://www.adafruit.com/category/63_98

These displays use SPI to communicate, 4 or 5 pins are required to  
interface

Adafruit invests time and resources providing this open source code, 
please support Adafruit and open-source hardware by purchasing 
products from Adafruit!

Written by Limor Fried/Ladyada  for Adafruit Industries.  
Scrolling code contributed by Michael Gregg
BSD license, check license.txt for more information
All text above must be included in any redistribution

To download. click the DOWNLOADS button in the top right corner, rename the uncompressed folder Adafruit_SH1106. Check that the Adafruit_SH1106 folder contains Adafruit_SH1106.cpp and Adafruit_SH1106.h

Place the Adafruit_SH1106 library folder your <arduinosketchfolder>/libraries/ folder. You may need to create the libraries subfolder if its your first library. Restart the IDE.

You will also have to download the Adafruit GFX Graphics core which does all the circles, text, rectangles, etc. You can get it from
https://github.com/adafruit/Adafruit-GFX-Library
and download/install that library as well