FriendlyElec’s latest single-board computer looks like a Raspberry Pi 3 and has a lot of the same features, including a 40-pin header, WiFi, and a quad-core ARM Cortex-A53 processor.
The NanoPi K1 Plus also has 2GB of RAM, which is twice as much as you get with the latest Raspberry Pi computer, and in addition to having a microSD card reader, you can use an optional eMMC module for storage.
The NanoPi K1 Plus is available for purchase from FriendlyElec for $35.
There’s also a micro USB OTG port that can be used to connect a power adapter or for data transmission.
FriendlyElec also equipped the system with an onboard microphone and an infrared receiver, which could make this an interesting choice for use in a kiosk or digital signage system. You could also theoretically use it as a media center system.
The Linux Sunxi community reports that initial support for the Allwinner H5 chipset was added to the Linux kernel starting in 2017, and FriendlyARM offers an Ubuntu Core-based operating system image for the NanoPi K1 Plus called FriendlyCore.
You can find more details about the hardware and instructions for setting up the software at the FriendlyElec Wiki.
Or you could just stick with the Raspberry Pi platform, which already has a huge user community and support for a bunch of different operating systems.