These are the local, regional and university transit agencies providing and coordinating services in the Triangle region.

Go Triangle 
Triangle Transit Authority (regional service throughout the Triangle area) is now GoTriangle Regional Transit Trip Planner

Go Durham
Durham Area Transit Authority (DATA) is now GoDurham

CHT
Chapel Hill Transit

OCPT
Orange County Public Transportation (rural Orange County)

Go Raleigh
Capital Area Transit (Raleigh) is now GoRaleigh

Go Cary
Cary Transit

Duke
Duke University and Medical Center

NCSU Wolfline
North Carolina State University

GoTransit (TransLoc) 
Real Time Bus Locations with TransLoc