This is for self-help materials, rather than professional help resources.
http://www.get.gg/ is a really good website of self-help resources.
Free printable worksheets http://www.get.gg/freedownloads2.htm
Free printable leaflets http://www.get.gg/freedownloads.htm
Safety plan - Coping with suicidal thoughts http://www.get.gg/docs/SafetyPlan.pdf
CBT Self-help course booklet http://www.get.gg/docs/SelfHelpCourse.pdf
Also, Living Life to the Full is a free online CBT course at http://llttf.com/