Amazon.com: MCIGICM 10pcs Male Header Pin, 40 Pin Header Strip (2.54 mm) for Arduino Connector : Electronics
Sparkfun CAB-14575 LED Strip Pigtail Connector (3-pin) Arduino, Electronics and Robotics Electan, OnLine Store
Shield stacking headers for Arduino (R3 Compatible) : ID 85 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: Chanzon Round Pin Header Strip for Arduino Gpio 4 pin x 50pcs Male Headers Pins Straight Single Row Gold Plated Pitch 2.54mm 0.1 inch Breakaway for PCB Connector Raspberry pi Machine