The rocker switch is a classic and this one is a great size for an unobtrusive on/off switch. It can be panel mounted and has two tabs for connecting wire.
Rocker Switch - SPST (right-angle) - COM-08837 - SparkFun Electronics
Description Features These panel-mounting rocker switches have built-in indicator lights to let you know when your switch is engaged. They mount into
Rocker Switch - Round w/ Blue LED
A Diverse Selection of Electronics Books, Breakout Boards, and
eFuncar 6Pcs 12V 24V Toggle Switch, 4Pin SPST ON Off Dashboard
Otto sealed rocker switch, momentary, K2 series, red paddle actuator, double pole K2ADMAAAAA
K2ADMAAAAA Otto K2 Series Sealed Spring Loaded Rocker Switch, Red Paddle Actuator
This little round on/off/on toggle switch is rated up to 10A at 125VAC and can be panel mounted in a 20mm diameter hole. It'll also look pretty slick
SparkFun Rocker Switch - On/Off/On (Round)
Linseray 8 Pcs LED Lighted Round Rocker Switch Press Button On/Off
Description Features This simple on-off switch is rated for 20A at 12V but who cares about all that, it looks way awesome. These toggle switches come
Toggle Switch and Cover - Illuminated (Red)
PDF) Openstage: A Low-Cost Motorized Microscope Stage with Sub
SparkFun Electronics COM-08837 SparkFun Accessories Rocker Switch