massive Xilinx Artix-7 A200T FPGA and on-board RAM still in an M.2 form-factor. It’s affordable, expandable (has I/O), and is open source. And it’s now crowdfunding.
Check out the project page for more information: https://www.crowdsupply.com/rhs-research/nitefury
Flexible, next-generation, open source software-defined radio
A small, portable, USB-connected electronics lab-on-a-board that includes an oscilloscope, waveform generator, power supply, logic analyzer, and multimeter.
A palm-sized, reconfigurable Linux computer that connects to the real world: ARM + FPGA + Wi-Fi + Bluetooth + 180 I/O