Throwing some motors are okay but making them go with the LoadCape is much more sophisticated.

I2C relay UART RS232 optocoupled power supply switching PRU GPIO

Replicape is an open source hardware and software project for bringing 3D printer capabilities to the BeagleBone and BeagleBone Black

BBB, Arduino UNO 5V interface

Affordable plastic BeagleBone Black enclosure

Replace the brain in your LEGO MINDSTORMS EV3 with a BeagleBone Black.

MikroElektronika mikroBus Cape

Antique Podcast Player

External Signal Cape - protecting Your vulnerable BBB IO-Ports by level-conversion and protection elements.

BeagleBone Black SDR cape: software-defined receiver (0-30 MHz), web-controlled, ADC + FPGA + GPS

Turning DNA into Data

BeagleBone Black 0.96" OLED Display 128x64 pixels

GVS Card

BeaglePhone

Simple, low cost, SDR and RF instrumentation boards

Bone Tagzzz is an RFID cape for beagle bone black with Bluetooth Low Energy support for use as a smart, connected RFID sensor.