There are many charities that are working to help the people of Haiti. Here is a list of some of the groups that are accepting donations:

Text Message Donations
American Red Cross: Text "HAITI" to 90999 to donate $10
Clinton-Bush Haiti Fund: Text "QUAKE" to 20222 to donate $10
Yele Haiti: Text "YELE" to 501501 to donate $5

Websites That Are Accepting Donations
Doctors Without Borders
American Red Cross
Clinton-Bush Haiti Fund
Yele Haiti
Direct Relief
UNICEF
Partners in Health
Save the Children
Feed the Children
Habitat For Humanity