This is a free, 24/7 support service that allows students to text a trained crisis counselor. It's available nationwide and is often promoted in schools and universities.
The Jed Foundation is a non-profit organization focused on protecting emotional health and preventing suicide among teens and young adults. They partner with high schools and colleges to strengthen mental health programs.
Active Minds is a nonprofit organization supporting mental health awareness and education for young adults, particularly in college settings. They have chapters at over 600 colleges and high schools.