Has gazillions of articles from journals and other places in the form of downloadable pdfs. Very useful site for historical research and of course looks perfectly legal...
The Internet Archive BookServer, A Future for Books, distributed lending & vending on the internet is an Open Web for Books project for worldwide distribution of e-books. BookServer with more than 1,5 millions books is, today, one of the biggest digital libraries offering and sharing free access to digital books both in PDF and ePub format, the latest recommended by the International Digital Publishing Forum a free and open e-book standard with extension ".epub".
also has audio clips on each page giving explanations and little tidbits - as well as zoom controls and when you scroll your mouse over a page, a zoomed pop up appears with info...since we discuss Vesalius's book on Anatomy, it was a great way for my students to view the actual resource and draw correlations between him and the Renaissance - as the audio and extra info discusses his desire to help sculptors and painters...
'Containing works by the classic SF pulp writers of the Golden Age right through to modern award-winning authors, the SF Gateway is the largest library of digital Science Fiction and Fantasy ever assembled. With news, opinions, community features and forums, and links to the ultimate SF authority, The Encyclopedia of Science Fiction, the site should quickly become the natural home on the net for anyone with an interest in classic SFF. '