The Vedic Literature Collection at Maharshi University of Management site is perhaps the largest collection of Hindu scriptures available on the world wide web. This collection comprises of more than 300 Hindu scriptures with original Sanskrit texts (there is no translation) in pdf format. Since almost all the texts are digitized, the whole collection is only around 1GB in size (sizes of some of the texts are less than 100 KB). As you can see in the image given above, the collection contains all the vedas, upavedas, vedangas, six darshanas, 18 puranas and upapuranas, stotras, etc.
 
Index of Vedic Literature
 
Vedic Literature Main Page