Resource types:

• free website
• free website, registration required
• paid website
• free book/ebook
• paid book/ebook
• Open Access Journal

• Crash Course Anatomy and Physiology  (Hank Green)
• Quantitative Physiology: Cells and Tissues (6.021J, 2004)  (Dennis Freeman, Massachusetts Institute of Technology)
• Quantitative Physiology: Organ Transport Systems (HST.542J, 2004)  (OpenCourseWare, Massachusetts Institute of Technology)

• Algorithms for Computational Biology (6.096, 2005)  (Manolis Kellis, Massachusetts Institute of Technology)
• Analysis of Biomolecular and Cellular Systems (23.320)  (OpenCourseWare, Massachusetts Institute of Technology)
• Crash Course Biology  (Samuel Ramsey, University of Colorado - Boulder)
• Data Science for Biologists  (Steve Brunton, University of Washington)
• Ecology I: The Earth System (1.018J, 2009)  (OpenCourseWare, Massachusetts Institute of Technology)
• Macroepidemiology (BE.102)  (William Thilly, Massachusetts Institute of Technology)
• Molecular and Cellular Pathophysiology (BE.450)  (David Schauer, Massachusetts Institute of Technology)
• Noninvasive Imaging in Biology and Medicine (22.56J)  (Alan Jasanoff, Massachusetts Institute of Technology)

• Crash Course Botany  (Alexis Nikole Nelson)

• Geology  (Professor Dave)
• Introduction to Atmospheric and Space Sciences  (M. V. Sunil Krishna, Indian Institute of Technology Roorkee)

• Systems Microbiology (20.106J)  (OpenCourseWare, Massachusetts Institute of Technology)
• Systems Microbiology (20.106J, 2006)  (OpenCourseWare, Massachusetts Institute of Technology)

• Crash Course Zoology  (Rae Wynn-Grant, National Geographic Society)