BeagleBone and Adafruit 1.8″ SPI LCD Not much info but has video about frame buffer.
Controlling a HD44780 LCD on a BeagleBone, pt1 Display connected directly to BB, basic code to put up static text
RTL-SDR spectrum analyzer on the Beaglebone : Uses cape, lots of info about using a different image on BB, top notch project, provides purpose built images
Connect an SSD1289 LCD to a Beaglebone : Fantactic tutorial, get lcd display module working from kernel, downloaded kernal patch.
Driving Numeric LED Display : Basic, has some code for mux and some code in git