The National Center for Posttraumatic Stress Disorder (NCPTSD) is sponsored by the United States Department of Veteran Affairs, but its work (as well as its website) is a good resource for all trauma survivors, not just military veterans. On the website you can find fact sheets about PTSD and its various causes as well as links to other good resources and information on how to find a mental health care provider for yourself, a family member, or a friend.
What I think stands out about the NCPTSD's work is the PILOTS database-- Published International Literature On Traumatic Stress. The goal of the project is to index every academic work published on PTSD, no matter what language or journal it is published in. If you might benefit from reading academic studies on trauma, this is definitely a great resource.
Also, this summer I will actually be working on PILOTS with Dr. Fred Lerner and his team. Best volunteer job ever! I am thrilled to have this opportunity. :D