TFT Wristwatch on Lucidtronix:

Using the enchanting TFT LCD Screen from adafruit and the DS1307 chip for keeping the time we demonstrate a wearable wristwatch with full spectrum 16-bit color. Displays the time and date in analog, digital and animated formats. Using our color library we color code the time so that each minute is a journey through the rainbow! The watch contains a Piezo buzzer so it can be used as an alarm or as a stop watch. The on-board potentiometer lets you change the time should you find yourself in a new time zone, for example. There is a great tutorial at adafruit on how to use the DS1307 chip to keep track of time. Our circuit is based on that one but use surface mount components and hooks up directly to the SDA and SCL pins on the SMD Atmega328 IC.

1.8″ SPI TFT display, 160×128 18-bit color – ST7735R driver – We just love this little 1.8″ TFT display, with true TFT color (up to 18-bits per pixel!), fine 160×128 resolution, two white LED backlight that runs on 3.3V and a very easy SPI interface that requires only 4 or 5 digital pins to send pixels to the display.