This belt was designed to take the place of a multitool.
The buckle holds one of three slide-out custom-built tools: buyers choose between devices designed to fix either skis and snowboards, skateboards, or bikes. The bike tool comes with all the standard bits (including the most common Allens) plus a tire lever and spoke wrench.
The project was just funded on Kickstarter. The tools should ship in September.
From $65, kickstarter.com