Liven up your next gathering by letting Bartendro ($500-$2,500) take care of your drinks. Available in models with 3, 7, or 15 dispensers, this Raspberry Pi-powered gadget lets you hook the dispensers to various juices and liquors, then choose a drink you'd like to make out of them from your tablet or smartphone. The desired specifcations are sent over Wi-Fi to the machine, which uses peristaltic pumps to precisely dispense the ingredients that are then mixed and dropped into your glass. Prefer to keep things simple? $300 will buy you the same tech in a single Shotbot.