The 3-Pin TO-92 is probably easiest - you could bend one over and fit it on top without it protruding very far at all.
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
The 3-Pin TO-92 is probably easiest - you could bend one over and fit it on top without it protruding very far at all.