GVRLGVRL is a large collection of reference ebooks. It has a wide range of topics that are easy to search.
IMAGE QUESTDatabase containing millions of copyright friendly, downloadable images featuring an easy to use citation tool
NATIONAL GEOGRAPHICThis database has National Geographic magazine archives from 1888 - the present. It also has ebooks, articles, images and videos on topics such as animals, the environment, history, people, cultures, science, technology, and travel.