Estimote is a new form of technology called 'nearables'. They are context aware stickers that you can place on your most used possessions and give you data about them such as 'if they have moved' and send you messages to notify you that 'you just left your bag at a coffee shop'. Estimote technology also contains broader technology such as temperature sensors, and also seems to have focused on helping retail environments better understand whats happening in their stores. you can pick up a starter kit for $99 on Estimote.com