Karried, as others have said FTC is based out of OKC. If you're still interested, you could even swing by and talk to them. Sometimes they even let you (and are usually always looking for volunteers), to fill the large boxes of rice, beans, etc.

Another good charity out of OKC is World Neighbors, it's a credible nationwide nonprofit, but based right out of here in OKC. Also, the Center for Nonprofits is out of OKC and they can get you in touch with dozens of non-profits in the metro.