(Image credit: Future) It's Amazon Prime Day , so it's the perfect time for an impulse purchase. We've compiled a list of 13 cool, budget-friendly gadgets, tools, and gizmos that you can get for just $13. There's a whole heap of fill-your-drawer stuff here to sink your teeth into. There are kits to fix PCs and clean up grubby keyboards, network switches, and WiFi adapters to get yourself online, and plenty of cables and stands to keep things tidy. We've grouped them together, too, to help you get to the sections you're most interested in. Arctic M2 Pro Heatsink Cooler for $5 Half-price rotating headphone hanger for $11.99 TP-Link five-port Gigabit Ethernet switch for under $8 Check out more Amazon Prime Day tech deals Cables and adapters Cables are often the forgotten part of our tech arsenal, but they're essential and, if you're careful about it, cheap to buy. We need 'em to charge all of your gadgets and hook them up to your screens and speakers. Adapters, too, help us connect one type to another.…