VoCore2 is an updated version of the highly-popular coin-sized Linux computer VoCore. Like it's predecessor, VoCore2 is totally open-source, and costs $15. This is a small, low-cost, totally open-source (both the hardware and software) computer that's ideal for projects such as IoT or building your own custom router.
VoCore2 also features an optional camera and dock.
If that's not enough there's a stripped down version of the VoCore2 that's available for a mere $4!
At $9, C.H.I.P. is a perfect demonstration of how cheap computing has become. You get what would only a few years ago have been desktop power on a tiny board.
The easiest way to create internet-connected devices - no programming, soldering or wiring required. IFTTT support allows it to connect with any web service, like Facebook, Gmail and Twitter, or hardware like NEST and Philips HUE.
All for just $59.95.
The PixelPro features a i.MX6Q Quad-core ARM Cortex-A9 running at 1.0 GHz, with 2D and 3D GPUs and an embedded 2GB 64-bit DDR3 RAM, which means that it is capable of running rich multimedia applications, embedded web servers, digital entertainment systems, industrial control systems, and high definition video.
At $129.95, the PixelPro is not cheap, but you get a lt of power for the cash.
At around $92, the Intel name doesn't come cheap, but this Arduino-compatible board is turning out to be a popular choice.
The NanoPC-T3 is the bigger brother of the NanoPi 2 Fire, and features an octa-core processor which has enough power for commercial and industrial applications.
BeagleBone Black is a low-cost, community-supported development platform for developers and hobbyists. This $55 board allows you to boot Linux in under 10 seconds and get started on development in less than 5 minutes.
A $135 quad-core board that's just as at home running Android as it is Linux.
A $40 Arduino that's idea for integration into a commercial or industrial product.
The Parallella computer is a high performance, credit card sized computer based on the Epiphany multi-core chips from Adapteva. Starting at $99, the Parallella can be used as a standalone computer, an embedded device or as a component in a scaled out parallel server cluster.
A cheap, $23 quad-core powered board that's ideally suited for hobbyists.
Banana Pi M3 is a super charged single board computer with an Octa-core processor and 2GB of RAM. It also features Gigabit Ethernet, 2 USB, SATA, WiFi, Bluetooth, and HDMI connection. It can run on a variety of operating systems including Android, Lubuntu, Ubuntu, Debian, and Raspbian.