Tried and true business principles go a long way toward building success. But if you want cutting edge business ideas in a tech era that is being redefined on a monthly basis, you have to keep your eye on the start-ups. So here are 50 fresh start-ups that are rocking 2009 (including a few from past years that have surged through the down economy).

We are on the brink of a new era in our existence. This means that things that have always been popular in relation to business and trendiness are fading out. If you look back in history ten years ago, a lot has changed. There are less jobs, and more people going into business for themselves. Now some would look at the decreasing number of employee’s as something negative and discouraging. But me, I see it as an opportunity. It is how we are evolving. We are being presented the opportunity to become entrepreneurs. It is the future of our world.

Located below are four new business ideas that didn’t exist one year ago: