The palm-size Tunebug Vibe can turn almost any flat surface into a speaker. The device, which weighs just 5.3 ounces, plugs into a headphone jack and sends sound waves through whatever surface it sits on, producing a rich sound that rivals that of many travel speakers. The Tunebug works better on hollow surfaces, such as the cardboard "sound base" that comes with it, than on wooden desktops and other solid surfaces. It comes with a 3.5 mm audio cable and a USB cable for charging its battery, which lasts five hours when fully charged.
Cost: $70