The "extras" are a collection of small or experimental extensions to the SmSn real-time semantics and wearable computing framework. Basically, anything not mature or central enough to belong in SmSn proper, but worth experimenting with, is here.

Contents (in roughly descending order of importance):

• Autotactile Fabric: a gestural interface which acts as a "second skin", responding to the same touch sensations perceived by the wearer. Used in an RPI research project, Intelligent Sensory Substitution.
• SmSn RFID extension: adds UHF RFID tag recognition powers via Alien Technology readers
• Droidspeak: a minimal vocabulary of basic sounds for use with microcontrollers. Yes, it's a Star Wars reference.
• SmSn speech extension: adds speech recognition powers
• SmSn OpenCalais extension: adds OpenCalais entity recognition powers
• SmSn QR code extension: adds QR code powers
• SmSn WebDAV extension: toward WebDAV integration for Extend-o-Brain
• Ardreamo: placeholder for a sleep and dreaming wearable