For People in the UK:

http://www.depressionalliance.org/ 

http://www.samaritans.org/ 08457 90 90 90

http://www.depressionuk.org/

For People Elsewhere: 

http://www.befrienders.org/

USA Helplines: 

National Hopeline Network
Helpline 1: 1-800-784-2433 
Website: www.hopeline.com

California: Helpline 1: 310 391 1253 

Helpline 2: 877 727 4747 (Toll Free in LA County)
Website: www.suicidepreventioncenter.org

Massachusetts: Helpline 1: 617 247 0220 

Helpline 2: 877 870 4673 (Toll-free)
Helpline 3: 800 252 8336 (Toll-free Teenline)
Website: www.samaritanshope.org

New Hampshire: Helpline 1: (603) 357 5505 

Helpline 2: (603) 924 7000 
Website: www.samaritansnh.org

New York: Helpline 1: (212) 673 3000 

Website: www.samaritansnyc.org

Alabama: Helpline 1: (334) 821-8600

Helpline 2: Kids line: (334) 887-5437 

Website: http://www.home.earthlink.net/~crisiscenter/
Email Helpline: crisiscenter@earthlink.net 

I shall try and add to this list as often as possible: I am from the UK so any international helplines are limited to me, any help would be much appreciated.