Charity Navigator predicts that individual donors will give at least $100 billion to charities this holiday season. But is all that money really going to a good cause? Before you donate your hard-earned cash to a charity, you should do some research and make sure it's a reputable organization. Charity Navigator, one of our Top 101 sites, makes this easier by rating nonprofit organizations and presenting their findings in an organized and easy to use interface.

Be sure to check out Charity Navigator's holiday giving tips.