Human Rights Campaign:

The Human Rights campaign has a list of documents and resources for anyone considering coming out.

GLSEN:

GLSEN has a document specifically for lgbtq+ students in need of coming out resources.

The Trevor Project:

Through the Trevor Support Project, here is a coming-out handbook for lgbtq+ youth.

The Matthew Shepard Foundation

This foundation has compiled a list of resources as well as a working dictionary on lgbtq+ terms and coming out advice.