ASU Prep Digital - https://www.asuprepdigital.org/asu-for-you/#free_online
Youtube Subscriptions (recommended)
patrickJMT (calc help)
Online College Courses - https://www.edx.org/
AP 2 Review of difficult topics - https://www.edx.org/course/ap-physics-2-challenging-concepts
Khan Academy - https://www.khanacademy.org/science/ap-physics-2
Bozeman Science - http://www.bozemanscience.com/ap-physics-2-video-list
Fluids and Thermo - https://www.edx.org/course/ap-physics-2-part-1-fluids-and-thermodynamics
E and M - https://www.edx.org/course/ap-physics-2-part-2-electricity-and-magnetism
Test Review - https://www.edx.org/course/ap-physics-2-part-4-ap-review-and-exam-preparation
Optics and Modern - https://www.edx.org/course/ap-physics-2-part-3-optics-and-modern-physics
Online College Courses - https://www.edx.org/
AP physics C from another point of view - https://www.edx.org/course/on-ramp-to-ap-physics-c-mechanics
AP physics 1 Challenge topics (overlap with physics C somewhat) - https://www.edx.org/course/ap-physics-1-challenging-concepts-2
College Board AP Review Channel - https://www.youtube.com/user/advancedplacement
College Board AP C Class and Course Review Stream - https://www.youtube.com/playlist?list=PLoGgviqq48467T6PU5a6QwxNgUb5SgI9V
Torque and related - https://www.edx.org/course/mechanics-part-2-2
Not part of Mechanics, but if you are interest in Electricity and Magnetism - https://www.edx.org/course/preparing-for-the-ap-physics-c-electricity-and-mag
ASU Prep Digital - https://www.asuprepdigital.org/asu-for-you/#free_online
From Tulane University - Energy
National Resource Defense Council (NRDC) - Renewable Energy
National Geographic - Energy Resources
eia - U.S. Energy Information Administration - Renewable Energy Explained