Recently I've bought a bunch of cheap 74HC595 shift register IC's. But SOIC case is not suitable for solderless breadboard. I didn't want to buy this IC's in a DIP case too, so I've made my own breakout board for them. Single side PCB with 3 jumper wires on top side. Not so small as Adafruit's (for example), but easy to make with laser printer and iron. Supports daisy chain.