I will list a few of those organizations here. Please take the time to at least take a look, and let them know they aren't forgotten.
Soldiers' Angels is a volunteer-led 501(c)(3) non-profit with hundreds of thousands of volunteers providing aid and comfort to the men and women of the United States Army, Marines, Navy, Air Force, Coast Guard, veterans and their families.
For those who have given so much, and now need a little extra help to get back into the swing of things, there is the Wounded Warrior Project. They let our wounded soldiers, sailors, and marines know they haven't been forgotten after they return home. Their web page is at: www.woundedwarriorproject.org
Operation Gratitude, sends care packages to those serving overseas. Great way to say thanks to our troops. This is a great way to help. http://www.opgratitude.com