Joystick Keyboard Switch
Pushbutton Power Switch LV (POLOLU-751)
Tactile Button Assortment - COM-10302 - SparkFun Electronics
High-power MOSFET Trigger Switch Drive Module (ER-ACR03075M)
Mini Pushbutton Switch - COM-00097 - SparkFun Electronics
Momentary Pushbutton Switch - 12mm Square - COM-09190 - SparkFun Electronics
Catalog Sparkfun APR 2013, PDF, Switch
Soft Power Switch - SparkFun SPX-17870 Botland - Robotic Shop
SparkFun Touch Potentiometer (Sparkfun PRT-13144)