Rediscovering Biology is a comprehensive free learning resource that covers 13 different topics- mostly with an emphasis on Biochemistry and Genetics.
Each topic has an introductory video, downloadable texbook, course outline, learning activities and a selection of images and animations in quicktime, which are high-quality. One of the highlights of the site is the selection of immersive case studies. There is also a useful pop-up glossary.
Topics: Genomics, Proteins and Proteomics, Evolution and Phylogenetics, Microbial Diversity, Emerging Infectious Disease, HIV and AIDS, Genetics of Development, Cell Biology and Cancer, Human Evolution, Neurobiology, Biology of Sex and Gender, Biodoversity, Genetically Modified Organisms.