If you live in Baltimore City, you will pay a 2.248 percent tax this year on any property you own, unless you're a cheat, a fraud, or a renter, in which case your landlords will just jack up your rent because TRICKLE-DOWN SCREW YOU. So, how to complain about how high your property taxes are relative to your neighbors'? BmoreMapped.com, the product of one Ryan Smith, a biomedical engineering Ph.D. candidate at Johns Hopkins University. Online and interactive, it pulls property-tax payment data straight from a dataset kept on the city's open data website and lays it on top of a map of the city. Search by address, hover your mouse cursor over your neighbor's house, and boom-that's how little they pay compared to you. Don't invite them to your parties.