The Sipeed Tang Nano 9k FPGA board has several specialized interfaces; also it has 2 push-buttons and 6 LEDs. It is also have a fair number of pins which can be connected to many things.
Inspired by NAND land's "The Go Board", and other more expensive and traditional FPGA evaluation boards, I want to make an adapter board that has a number of switches, LEDs, 7-segment displays, VGA output and interface to 5V level logic (as the board itself uses 3.3V levels), into which the Nano board could be plugged in.