Anyone who's ever needed to find their phone knows the value of GPS tracking, but existing solutions for other items are expensive, bulky, or both. The Magpie GPS Tracker is a 1.5-inch square gadget that lets you track nearly anything almost anywhere in the world. It attaches with a hook or clip, is waterproof and dirtproof, has an accelerometer so it can alert you if it's moved, and lasts up to three months on a single charge. Those features make it ideal for tracking the movements or whereabouts of everything from suitcases and camera bags to children and pets. Available in three colors, it comes with a year of service, with pricing under $50 a year afterward.