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This C1 Ultrasonic Cutter, by Chinese tool manufacturer Hanboost, is designed to make delicate cuts in plastic easy.
The cordless, rechargeable-battery-powered tool vibrates at 40,000 HZ, allowing you to slice with ease; it seems like the ideal tool for cleaning up 3D prints.
It takes standard 30-degree angle hobby knife blades, though changing them does involve an Allen key.
The company claims it’ll cut through a lot more than plastic:
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The C1 has gone gangbusters on Kickstarter, racking up $522K-plus at press time, with 10 days left to pledge. Prices start at $109.