5 of 7
Yipit: Groupon of Groupons
Yipit: Groupon of Groupons

If you like keeping tabs on the best deals but can't keep track of all those sites, you'll like Yipit, a startup cofounded by Harvard grads Vinicius Vacanti and Jim Moran, that handily filters and aggregates deals from 397 services, including many of the ones mentioned here. Best of all, when you get those deals sent to your inbox every day, they're compiled into one handy email. To date, it's raised $1.3 million from venture capital firms like Ron Conway's SV Angel and RRE Ventures.

NEXT: BuyWithMe: Boston Groupon Party
Last updated March 17 2011: 2:57 PM ET
Humor is integral to Groupon according to editor-in-chief Aaron With but its Super Bowl ads pushed the envelope too far. More
A company that wants to bring online storage and sharing to the masses? Hardly original, but with numbers like these, Dropbox may do just that. More
The leading daily deals site has everything going for it domestically, but that means nothing when it comes to avoiding the scrap heap other high-flying U.S. Internet companies have been tossed onto in China. More