From MSN.com:
The Stark Hand

Created by Mark Stark, The Stark Hand prototype provides an ingenious, comfortable, and very inexpensive alternative to the hook his friend Dave Vogt had worn all his life. With the new hand, Dave can now catch balls and grip wine glasses.

The BodyGuard

David Brown designed The BodyGuard, a crime-fighting armored glove, as built-in self protection. The demo model has a camera, a wrist mounted stunner and lots of room for future improvements. The idea came to David while talking to his friend, Kevin Costner.

The PrintBrush

Weighing in at less than a pound, Alex Breton’s PrintBrush easily fits in a laptop bag and prints on any flat surface, from wood to fabric to plastic. Alex worked on the project for 11 years, but a version with a bonus built-in camera comes out early next year.

The Katal Landing Pad

Aaron Coret and his friend Stephen Slen came up with the Katal Landing Pad after Aaron had a nasty snowboarding accident. The board, which was used during the 2010 Winter Olympics, provides a giant cushioned landing for snowboarders and helps make the sport safer.

Check out our feature on the Katal Landing Pad, with bonus video interview, here.

Dynamic Eye Sunglasses

John B. Carnett / Popular Science

Unlike regular sunglasses, Chris Mullin’s glasses block glare instantly with liquid crystal lenses that darken the most where the sun’s light is the brightest. A particularly sunny commute inspired Mullin’s invention.

The Bed Bug Detective

Built to imitate a dog’s nose, the Bed Bug Detective sniffs out bedbugs quickly. Chris Goggin plans to create a model that can detect other pests, too, including mice and cockroaches.

A Prenatal Marker to Screen for Pregnancy Complications

Designed by a college student and his classmates, the Prenatal Screening Kit, or safety pen, helps detect complications in pregnancies at an early stage. The pen will be quite cheap, costing only a third of a cent per use, making it a perfect tool for hospitals in developing nations.

The Zero Liquid Discharge

With a pleasant name for a gross procedure, the Zero Liquid Discharge, or ZLD, completely oxidizes and evaporates sewage from boats, airplanes and RVs. After flash evaporation, the waste leaves as a harmless, odorless aerosol.

Kymera Motorized Body Board

The lightweight Kymera Body Board is Jason Woods’s solution for a timeless problem (for lucky people): how to have fun at the lake without the hassle of lugging a boat around. The latest version of his motorized body board hits speeds of 25 mph.

The Medical Mirror

While it can’t tell you if you’re the fairest of them all, the Medical Mirror can tell you your heart rate, which is probably more valuable in the long run anyway. A webcam behind the mirror captures variations in reflected light on your face, and an algorithm translates that into heartbeats.