I recently come across Scitable, a Nature Education initiative, that aims to bring together a library of scientific overviews with a worldwide community of scientists, researchers, teachers and students. From Scitable:
[Scitable is] a free science library and personal learning tool brought to you by Nature Publishing Group, the world’s leading publisher of science. Scitable currently concentrates on genetics, the study of evolution, variation, and the rich complexity of living organisms.
*This blog post was originally published at ScienceRoll*