This is a list compiled from various sources, of information and charities involved in relief efforts in the Gulf states.
By no means is this a complete list, nor does inclusion on this list mean I endorse any of the charities. There is at least one link on how to chose a reputable charity, which can help you decide where to direct your efforts.
Feel free to add more information in the comments.
American Friends Service Committee
http://www.redcross.org/ 1-800-HELP NOW (1-800-257-7575 in Spanish)
Second Harvest, the famous food bank. Originally started as Kentucky Harvest, nonsectarian.
Presbyterian Disaster Response
United Methodist Committee on Relief
Tzu Chi, a Buddhist charity group that is operating a relief fund.
Lutheran disaster fund.
Mennonite disaster service
Catholic Charities USA
United Jewish Committee.
Doctors Without Borders/Medecins Sans Frontieres; in the event they may need to call doctors to treat people or run morgues in NOLA; water borne diseases are expected, among other things.
American Radio Relay League, aka ham radio.
Friends Disaster Service
Hurricane Watch Net
Volunteers of America
REACT International, another group (this one largely working with CB radio operators and ham operators) for communication in areas that have been subjected to disasters.
Habitat for Humanity- mentioned because Habitat housing is probably going to be *badly* needed if/when New Orleans is rebuilt.
Unitarian Universalist Service Committee
Humane Society of the US disaster fund. HSUS operates rescue and housing for pets during hurricane evacuations and after storms have hit.
Noah’s Wish– they are an animal rescue charity that specialises in disaster rescue and care of animals. They are actively helping out in the Slidell, LA area in particular. Of note, they do assist in rescue of nontraditional pets (like snakes, "pocket pets" like ratties, etc.) which are occasionally not accepted in HSUS shelters.
Americares, another non-sectarian international charity group. hey are actively contributing to NOLA relief efforts; Writer’s Cafe has a website set up where people can donate via Paypal (http://writerscafe.net/donations.html#fark9).
it is list of relief organizations
As of Sunday morning, over 17,000 beds available — matches beds with refugees
The Salvation Army (1-800-SAL-ARMY (725-2769))
Animal Evacuation and Recovery Plan for New Orleans
The Humane Society
Humane Society of NW Louisiana (318-219-PETS)
United Animal Nations
Best Friends (animal victims)
B’nai B’rith International
HUGE list of charities to donate to
Matching people up with housing
Charity Database and info on how to best select a charity to donate to, particularly to victims of the hurricane