The entrants in the second annual Greener Gadgets Design Competition ranged from practical to message-sending, and the winning design was a mix of the two.

Chosen by the audience at the Greener Gadgets conference in New York City, the winner of the design competition was the Tweet A Watt, a modified Kill A Watt power monitor that sends a user's daily power consumption - and their power use goal - out through Twitter.

Along with providing constant monitoring of how much electricity a user is consuming, it also puts their energy use out in the open for their friends and others to see, providing incentive to use less energy, and encouraging others to do the same.

Prior to letting the audience choose the greenest gadget, judges Jeff Kapec of Tanaka Kapec Design Group, Inhabitat editor in chief Jill Fehrenbacher and inventor Saul Griffith discussed their 13 favorite projects (culled from the previous top 50 designs), narrowing the list down to four designs: the Tweet A Watt, Power Hog, Indoor Drying Rack and Laundry Pod.

If you weren't able to make it out to the conference, check out Inhabitat's live blog recap of the event's presentations and discussions.