OLED Display 0.96" I2C 128x64 SSD1306 
 
This is easy to use OLED display, 0.96” screen size, 128x64 resolution and SSD1306 driver. You can connect to it via I2C (despite of PCB description it’s address is 0x3C not 0x78). Easy programming on Arduino. You can use Adafruit’s SSD1306 library.
Specification:
Driver: SSD1306
Screen size: 0.96”
Screen dimensions: 22 x 11 mm
Resolution: 128 x 64 pixels
Supply voltage: 3 - 5 V
Module size: 27 x 27 x 3.5 mm
Pinout:
GND - Ground
VCC - Supply voltage
SCL i SDA - I2C signal lines