With the Greener Gadgets Conference finally starting tomorrow in New York City we thought we’d give a brief preview of some of the 50 green gadget designs that have been entered in the conference’s design competition.

The winner will get $3,000 to go towards helping make theirs a reality. You can see a complete list of the 50 green gadgets online and vote for your favorite or if your planning on attending you can check them out yourself and vote on them there.

First up is the Recompute (pictured above). The Recompute is a computer with a case made entirely out of cardboard. The computer can be dismantled without tools for easy recycling of parts. It’s eight USB ports allows for plenty of external hardware customizations.

Then we have the Guilty Wallet. The Guilty Wallet is basically designed to shame and humiliate for spending too much. This might not be for everyone but chances are we all know someone who could benefit from this very original green gadget.

The Bware Water Meter is another interesting design. The Bware attaches to taps and shower heads and measures the amount of water used. An advanced kit version will include wireless connections and software that helps users track their usage.

Be sure to check out the full list of the Top 50 Green Gadgets and vote on your favorite.