4 links
Buddha's World
katinkahesselink.net
A personal selection of texts about sunnyata, emptiness and meditation. Mostly from Tibetan Buddhist sources, but also including material from Zen and other lineages.
IntraText: Bibliotheca Religiosa: Buddhistica
intratext.com
Index to Buddhist related texts (Sutras and others) on an open access digital library called IntraText.