Ask 4 Help: Made by and for young people in Kingston, UK, offers help and advice for teenagers by text message, email, or phone.
Been There Doing That: Forum moderators offer 5 perspectives on anonymous posting message board.
Bible Advice for Christian Teens: Topics of interest to teens with an added Christian bible perspective on those issues.
Free Advice and Help for School Kids and Youth between Ages 5 & 20: School kids and teenagers may ask questions and receive answers to common problems.
MavenGlobe Advice: Inviting questions on all topics, as well as featuring an archive of answers previously given by the volunteers.
Rausha's Teen Help Page: Advice for teens and parents on hot issues like sex, violence, terrorism, racism and drugs. Includes a link to the home page for more stuff.
Voices: Advice by email for teenagers in ten categories.
YouthOne.com - Peer Support Forums: Youth community in Edmonton, Canada has an advice forum.