ODROID is a line of single-board computers from Hardkernel of South Korea, known for offering more performance than the Raspberry Pi and for some unusual designs.1
Overview
ODROID boards mostly use Amlogic ARM chips, and over the years the line has included big.LITTLE designs (the ODROID-XU4), strong general-purpose boards (the ODROID-N2+), and even x86 models. Most run Linux or Android and expose GPIO headers, though pinouts and accessories differ from the Pi’s, so cases and add-ons are less universally compatible.
Where it fits
ODROID is the alternative you reach for when a Raspberry Pi is not fast enough but a Jetson is overkill — more CPU and memory bandwidth without a price jump into GPU territory. It competes with Rock Pi and Orange Pi. For a GopherTrunk node decoding several busy trunked systems at once, an ODROID’s extra cores can keep the demodulators fed where a smaller board would fall behind.