PSoC SDR  
A stand-alone SDR based on the PSoC-5 chip from Cypress.

KTH-SDR  
This was a building kit project for a SDR with a frequency range from 80 meters – 70 centimeter

Teensy-SDR
A SDR based on the Teensy-3.1 together with the Teensy Audio shield and a TFT-display.

RTL SDR Dongle